Contract Source Code:
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IBasePool } from "../vault/IBasePool.sol";
/**
* @notice Full state of any ongoing or scheduled amplification parameter update.
* @dev If there is an ongoing or scheduled update, `startTime` and/or `endTime` will be in the future.
* On initialization, startTime == endTime, and both startValue and endValue will reflect the initial amp setting.
* Balancer timestamps are 32 bits.
*
* @return startValue The amplification parameter at the start of the update
* @return endValue The final value of the amplification parameter
* @return startTime The timestamp when the update begins
* @return endTime The timestamp when the update ends
*/
struct AmplificationState {
uint64 startValue;
uint64 endValue;
uint32 startTime;
uint32 endTime;
}
/**
* @notice Stable Pool data that cannot change after deployment.
* @param tokens Pool tokens, sorted in token registration order
* @param decimalScalingFactors Conversion factor used to adjust for token decimals for uniform precision in
* calculations. FP(1) for 18-decimal tokens
* @param amplificationParameterPrecision Scaling factor used to increase the precision of calculations involving the
* `amplificationParameter`. (See StableMath `MIN_AMP`, `MAX_AMP`, `AMP_PRECISION`)
*/
struct StablePoolImmutableData {
IERC20[] tokens;
uint256[] decimalScalingFactors;
uint256 amplificationParameterPrecision;
}
/**
* @notice Snapshot of current Stable Pool data that can change.
* @dev Note that live balances will not necessarily be accurate if the pool is in Recovery Mode. Withdrawals
* in Recovery Mode do not make external calls (including those necessary for updating live balances), so if
* there are withdrawals, raw and live balances will be out of sync until Recovery Mode is disabled.
*
* @param balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
* @param tokenRates 18-decimal FP values for rate tokens (e.g., yield-bearing), or FP(1) for standard tokens
* @param staticSwapFeePercentage 18-decimal FP value of the static swap fee percentage
* @param totalSupply The current total supply of the pool tokens (BPT)
* @param bptRate The current rate of a pool token (BPT) = invariant / totalSupply
* @param amplificationParameter Controls the "flatness" of the invariant curve. higher values = lower slippage,
* and assumes prices are near parity. lower values = closer to the constant product curve (e.g., more like a
* weighted pool). This has higher slippage, and accommodates greater price volatility. Note that this is the raw
* amp value, not multiplied by `StableMath.AMP_PRECISION`
* @param startValue The amplification parameter at the start of an update
* @param endValue The final value of the amplification parameter
* @param startTime The timestamp when the update begins
* @param endTime The timestamp when the update ends
* @param isAmpUpdating True if an amplification parameter update is in progress
* @param isPoolInitialized If false, the pool has not been seeded with initial liquidity, so operations will revert
* @param isPoolPaused If true, the pool is paused, and all non-recovery-mode state-changing operations will revert
* @param isPoolInRecoveryMode If true, Recovery Mode withdrawals are enabled, and live balances may be inaccurate
*/
struct StablePoolDynamicData {
uint256[] balancesLiveScaled18;
uint256[] tokenRates;
uint256 staticSwapFeePercentage;
uint256 totalSupply;
uint256 bptRate;
uint256 amplificationParameter;
uint256 startValue;
uint256 endValue;
uint32 startTime;
uint32 endTime;
bool isAmpUpdating;
bool isPoolInitialized;
bool isPoolPaused;
bool isPoolInRecoveryMode;
}
/// @notice Full Stable Pool interface.
interface IStablePool is IBasePool {
/**
* @notice Begins changing the amplification parameter to `rawEndValue` over time.
* @dev The value will change linearly until `endTime` is reached, when it will equal `rawEndValue`.
* NOTE: Internally, the amplification parameter is represented using higher precision. The values returned by
* `getAmplificationParameter` have to be corrected to account for this when comparing to `rawEndValue`.
*
* @param rawEndValue The desired ending value of the amplification parameter
* @param endTime The timestamp when the amplification parameter update is complete
*/
function startAmplificationParameterUpdate(uint256 rawEndValue, uint256 endTime) external;
/// @dev Stops the amplification parameter change process, keeping the current value.
function stopAmplificationParameterUpdate() external;
/**
* @notice Get all the amplification parameters.
* @return value Current amplification parameter value (could be in the middle of an update)
* @return isUpdating True if an amplification parameter update is in progress
* @return precision The raw value is multiplied by this number for greater precision during updates
*/
function getAmplificationParameter() external view returns (uint256 value, bool isUpdating, uint256 precision);
/**
* @notice Get the full state of any ongoing or scheduled amplification parameter update.
* @dev Starting and ending values are returned in their full precision state.
* @return amplificationState Struct containing the update data
* @return precision The raw parameter value is multiplied by this number for greater precision during updates
*/
function getAmplificationState()
external
view
returns (AmplificationState memory amplificationState, uint256 precision);
/**
* @notice Get dynamic pool data relevant to swap/add/remove calculations.
* @return data A struct containing all dynamic stable pool parameters
*/
function getStablePoolDynamicData() external view returns (StablePoolDynamicData memory data);
/**
* @notice Get immutable pool data relevant to swap/add/remove calculations.
* @return data A struct containing all immutable stable pool parameters
*/
function getStablePoolImmutableData() external view returns (StablePoolImmutableData memory data);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { TokenInfo } from "../vault/VaultTypes.sol";
/**
* @notice Convenience interface for pools, to get easy access to information stored in the Vault.
* Intended mostly for off-chain requests; pools do not need to implement this to work properly.
*/
interface IPoolInfo {
/**
* @notice Gets the tokens registered in the pool.
* @return tokens List of tokens in the pool, sorted in registration order
*/
function getTokens() external view returns (IERC20[] memory tokens);
/**
* @notice Gets the raw data for the pool: tokens, token info, raw balances, and last live balances.
* @return tokens Pool tokens, sorted in token registration order
* @return tokenInfo Token info structs (type, rate provider, yield flag), sorted in token registration order
* @return balancesRaw Current native decimal balances of the pool tokens, sorted in token registration order
* @return lastBalancesLiveScaled18 Last saved live balances, sorted in token registration order
*/
function getTokenInfo()
external
view
returns (
IERC20[] memory tokens,
TokenInfo[] memory tokenInfo,
uint256[] memory balancesRaw,
uint256[] memory lastBalancesLiveScaled18
);
/**
* @notice Gets the current live balances of the pool as fixed point, 18-decimal numbers.
* @dev Note that live balances will not necessarily be accurate if the pool is in Recovery Mode.
* Withdrawals in Recovery Mode do not make external calls (including those necessary for updating live balances),
* so if there are withdrawals, raw and live balances will be out of sync until Recovery Mode is disabled.
*
* @return balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
*/
function getCurrentLiveBalances() external view returns (uint256[] memory balancesLiveScaled18);
/**
* @notice Fetches the static swap fee percentage for the pool.
* @return staticSwapFeePercentage 18-decimal FP value of the static swap fee percentage
*/
function getStaticSwapFeePercentage() external view returns (uint256 staticSwapFeePercentage);
/**
* @notice Gets the aggregate swap and yield fee percentages for a pool.
* @dev These are determined by the current protocol and pool creator fees, set in the `ProtocolFeeController`.
* @return aggregateSwapFeePercentage The aggregate percentage fee applied to swaps
* @return aggregateYieldFeePercentage The aggregate percentage fee applied to yield
*/
function getAggregateFeePercentages()
external
view
returns (uint256 aggregateSwapFeePercentage, uint256 aggregateYieldFeePercentage);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/// @notice Simple interface for permissioned calling of external functions.
interface IAuthentication {
/// @notice The sender does not have permission to call a function.
error SenderNotAllowed();
/**
* @notice Returns the action identifier associated with the external function described by `selector`.
* @param selector The 4-byte selector of the permissioned function
* @return actionId The computed actionId
*/
function getActionId(bytes4 selector) external view returns (bytes32 actionId);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/// @notice General interface for token exchange rates.
interface IRateProvider {
/**
* @notice An 18 decimal fixed point number representing the exchange rate of one token to another related token.
* @dev The meaning of this rate depends on the context. Note that there may be an error associated with a token
* rate, and the caller might require a certain rounding direction to ensure correctness. This (legacy) interface
* does not take a rounding direction or return an error, so great care must be taken when interpreting and using
* rates in downstream computations.
*
* @return rate The current token rate
*/
function getRate() external view returns (uint256 rate);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/// @notice Simple interface to retrieve the version of a deployed contract.
interface IVersion {
/**
* @notice Return arbitrary text representing the version of a contract.
* @dev For standard Balancer contracts, returns a JSON representation of the contract version containing name,
* version number and task ID. See real examples in the deployment repo; local tests just use plain text strings.
*
* @return version The version string corresponding to the current deployed contract
*/
function version() external view returns (string memory);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/// @notice Interface to the Vault's permission system.
interface IAuthorizer {
/**
* @notice Returns true if `account` can perform the action described by `actionId` in the contract `where`.
* @param actionId Identifier for the action to be performed
* @param account Account trying to perform the action
* @param where Target contract for the action
* @return success True if the action is permitted
*/
function canPerform(bytes32 actionId, address account, address where) external view returns (bool success);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IUnbalancedLiquidityInvariantRatioBounds } from "./IUnbalancedLiquidityInvariantRatioBounds.sol";
import { ISwapFeePercentageBounds } from "./ISwapFeePercentageBounds.sol";
import { PoolSwapParams, Rounding, SwapKind } from "./VaultTypes.sol";
/**
* @notice Base interface for a Balancer Pool.
* @dev All pool types should implement this interface. Note that it also requires implementation of:
* - `ISwapFeePercentageBounds` to specify the minimum and maximum swap fee percentages.
* - `IUnbalancedLiquidityInvariantRatioBounds` to specify how much the invariant can change during an unbalanced
* liquidity operation.
*/
interface IBasePool is ISwapFeePercentageBounds, IUnbalancedLiquidityInvariantRatioBounds {
/***************************************************************************
Invariant
***************************************************************************/
/**
* @notice Computes the pool's invariant.
* @dev This function computes the invariant based on current balances (and potentially other pool state).
* The rounding direction must be respected for the Vault to round in the pool's favor when calling this function.
* If the invariant computation involves no precision loss (e.g. simple sum of balances), the same result can be
* returned for both rounding directions.
*
* You can think of the invariant as a measure of the "value" of the pool, which is related to the total liquidity
* (i.e., the "BPT rate" is `invariant` / `totalSupply`). Two critical properties must hold:
*
* 1) The invariant should not change due to a swap. In practice, it can *increase* due to swap fees, which
* effectively add liquidity after the swap - but it should never decrease.
*
* 2) The invariant must be "linear"; i.e., increasing the balances proportionally must increase the invariant in
* the same proportion: inv(a * n, b * n, c * n) = inv(a, b, c) * n
*
* Property #1 is required to prevent "round trip" paths that drain value from the pool (and all LP shareholders).
* Intuitively, an accurate pricing algorithm ensures the user gets an equal value of token out given token in, so
* the total value should not change.
*
* Property #2 is essential for the "fungibility" of LP shares. If it did not hold, then different users depositing
* the same total value would get a different number of LP shares. In that case, LP shares would not be
* interchangeable, as they must be in a fair DEX.
*
* @param balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
* @param rounding Rounding direction to consider when computing the invariant
* @return invariant The calculated invariant of the pool, represented as a uint256
*/
function computeInvariant(
uint256[] memory balancesLiveScaled18,
Rounding rounding
) external view returns (uint256 invariant);
/**
* @notice Computes a new token balance, given the invariant growth ratio and all other balances.
* @dev Similar to V2's `_getTokenBalanceGivenInvariantAndAllOtherBalances` in StableMath.
* The pool must round up for the Vault to round in the protocol's favor when calling this function.
*
* @param balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
* @param tokenInIndex The index of the token we're computing the balance for, sorted in token registration order
* @param invariantRatio The ratio of the new invariant (after an operation) to the old
* @return newBalance The new balance of the selected token, after the operation
*/
function computeBalance(
uint256[] memory balancesLiveScaled18,
uint256 tokenInIndex,
uint256 invariantRatio
) external view returns (uint256 newBalance);
/***************************************************************************
Swaps
***************************************************************************/
/**
* @notice Execute a swap in the pool.
* @param params Swap parameters (see above for struct definition)
* @return amountCalculatedScaled18 Calculated amount for the swap operation
*/
function onSwap(PoolSwapParams calldata params) external returns (uint256 amountCalculatedScaled18);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
// Explicitly import VaultTypes structs because we expect this interface to be heavily used by external developers.
// Internally, when this list gets too long, we usually just do a simple import to keep things tidy.
import {
TokenConfig,
LiquidityManagement,
PoolSwapParams,
AfterSwapParams,
HookFlags,
AddLiquidityKind,
RemoveLiquidityKind,
SwapKind
} from "./VaultTypes.sol";
/**
* @notice Interface for pool hooks.
* @dev Hooks are functions invoked by the Vault at specific points in the flow of each operation. This guarantees that
* they are called in the correct order, and with the correct arguments. To maintain this security, these functions
* should only be called by the Vault. The recommended way to do this is to derive the hook contract from `BaseHooks`,
* then use the `onlyVault` modifier from `VaultGuard`. (See the examples in /pool-hooks.)
*/
interface IHooks {
/***************************************************************************
Register
***************************************************************************/
/**
* @notice Hook executed when a pool is registered with a non-zero hooks contract.
* @dev Returns true if registration was successful, and false to revert the pool registration.
* Make sure this function is properly implemented (e.g. check the factory, and check that the
* given pool is from the factory). The Vault address will be msg.sender.
*
* @param factory Address of the pool factory (contract deploying the pool)
* @param pool Address of the pool
* @param tokenConfig An array of descriptors for the tokens the pool will manage
* @param liquidityManagement Liquidity management flags indicating which functions are enabled
* @return success True if the hook allowed the registration, false otherwise
*/
function onRegister(
address factory,
address pool,
TokenConfig[] memory tokenConfig,
LiquidityManagement calldata liquidityManagement
) external returns (bool success);
/**
* @notice Return the set of hooks implemented by the contract.
* @dev The Vault will only call hooks the pool says it supports, and of course only if a hooks contract is defined
* (i.e., the `poolHooksContract` in `PoolRegistrationParams` is non-zero).
* `onRegister` is the only "mandatory" hook.
*
* @return hookFlags Flags indicating which hooks the contract supports
*/
function getHookFlags() external view returns (HookFlags memory hookFlags);
/***************************************************************************
Initialize
***************************************************************************/
/**
* @notice Hook executed before pool initialization.
* @dev Called if the `shouldCallBeforeInitialize` flag is set in the configuration. Hook contracts should use
* the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param exactAmountsIn Exact amounts of input tokens
* @param userData Optional, arbitrary data sent with the encoded request
* @return success True if the pool wishes to proceed with initialization
*/
function onBeforeInitialize(uint256[] memory exactAmountsIn, bytes memory userData) external returns (bool success);
/**
* @notice Hook to be executed after pool initialization.
* @dev Called if the `shouldCallAfterInitialize` flag is set in the configuration. Hook contracts should use
* the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param exactAmountsIn Exact amounts of input tokens
* @param bptAmountOut Amount of pool tokens minted during initialization
* @param userData Optional, arbitrary data sent with the encoded request
* @return success True if the pool accepts the initialization results
*/
function onAfterInitialize(
uint256[] memory exactAmountsIn,
uint256 bptAmountOut,
bytes memory userData
) external returns (bool success);
/***************************************************************************
Add Liquidity
***************************************************************************/
/**
* @notice Hook to be executed before adding liquidity.
* @dev Called if the `shouldCallBeforeAddLiquidity` flag is set in the configuration. Hook contracts should use
* the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param router The address (usually a router contract) that initiated an add liquidity operation on the Vault
* @param pool Pool address, used to fetch pool information from the Vault (pool config, tokens, etc.)
* @param kind The add liquidity operation type (e.g., proportional, custom)
* @param maxAmountsInScaled18 Maximum amounts of input tokens
* @param minBptAmountOut Minimum amount of output pool tokens
* @param balancesScaled18 Current pool balances, sorted in token registration order
* @param userData Optional, arbitrary data sent with the encoded request
* @return success True if the pool wishes to proceed with settlement
*/
function onBeforeAddLiquidity(
address router,
address pool,
AddLiquidityKind kind,
uint256[] memory maxAmountsInScaled18,
uint256 minBptAmountOut,
uint256[] memory balancesScaled18,
bytes memory userData
) external returns (bool success);
/**
* @notice Hook to be executed after adding liquidity.
* @dev Called if the `shouldCallAfterAddLiquidity` flag is set in the configuration. The Vault will ignore
* `hookAdjustedAmountsInRaw` unless `enableHookAdjustedAmounts` is true. Hook contracts should use the
* `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param router The address (usually a router contract) that initiated an add liquidity operation on the Vault
* @param pool Pool address, used to fetch pool information from the Vault (pool config, tokens, etc.)
* @param kind The add liquidity operation type (e.g., proportional, custom)
* @param amountsInScaled18 Actual amounts of tokens added, sorted in token registration order
* @param amountsInRaw Actual amounts of tokens added, sorted in token registration order
* @param bptAmountOut Amount of pool tokens minted
* @param balancesScaled18 Current pool balances, sorted in token registration order
* @param userData Additional (optional) data provided by the user
* @return success True if the pool wishes to proceed with settlement
* @return hookAdjustedAmountsInRaw New amountsInRaw, potentially modified by the hook
*/
function onAfterAddLiquidity(
address router,
address pool,
AddLiquidityKind kind,
uint256[] memory amountsInScaled18,
uint256[] memory amountsInRaw,
uint256 bptAmountOut,
uint256[] memory balancesScaled18,
bytes memory userData
) external returns (bool success, uint256[] memory hookAdjustedAmountsInRaw);
/***************************************************************************
Remove Liquidity
***************************************************************************/
/**
* @notice Hook to be executed before removing liquidity.
* @dev Called if the `shouldCallBeforeRemoveLiquidity` flag is set in the configuration. Hook contracts should use
* the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param router The address (usually a router contract) that initiated a remove liquidity operation on the Vault
* @param pool Pool address, used to fetch pool information from the Vault (pool config, tokens, etc.)
* @param kind The type of remove liquidity operation (e.g., proportional, custom)
* @param maxBptAmountIn Maximum amount of input pool tokens
* @param minAmountsOutScaled18 Minimum output amounts, sorted in token registration order
* @param balancesScaled18 Current pool balances, sorted in token registration order
* @param userData Optional, arbitrary data sent with the encoded request
* @return success True if the pool wishes to proceed with settlement
*/
function onBeforeRemoveLiquidity(
address router,
address pool,
RemoveLiquidityKind kind,
uint256 maxBptAmountIn,
uint256[] memory minAmountsOutScaled18,
uint256[] memory balancesScaled18,
bytes memory userData
) external returns (bool success);
/**
* @notice Hook to be executed after removing liquidity.
* @dev Called if the `shouldCallAfterRemoveLiquidity` flag is set in the configuration. The Vault will ignore
* `hookAdjustedAmountsOutRaw` unless `enableHookAdjustedAmounts` is true. Hook contracts should use the
* `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param router The address (usually a router contract) that initiated a remove liquidity operation on the Vault
* @param pool Pool address, used to fetch pool information from the Vault (pool config, tokens, etc.)
* @param kind The type of remove liquidity operation (e.g., proportional, custom)
* @param bptAmountIn Amount of pool tokens to burn
* @param amountsOutScaled18 Scaled amount of tokens to receive, sorted in token registration order
* @param amountsOutRaw Actual amount of tokens to receive, sorted in token registration order
* @param balancesScaled18 Current pool balances, sorted in token registration order
* @param userData Additional (optional) data provided by the user
* @return success True if the pool wishes to proceed with settlement
* @return hookAdjustedAmountsOutRaw New amountsOutRaw, potentially modified by the hook
*/
function onAfterRemoveLiquidity(
address router,
address pool,
RemoveLiquidityKind kind,
uint256 bptAmountIn,
uint256[] memory amountsOutScaled18,
uint256[] memory amountsOutRaw,
uint256[] memory balancesScaled18,
bytes memory userData
) external returns (bool success, uint256[] memory hookAdjustedAmountsOutRaw);
/***************************************************************************
Swap
***************************************************************************/
/**
* @notice Called before a swap to give the Pool an opportunity to perform actions.
* @dev Called if the `shouldCallBeforeSwap` flag is set in the configuration. Hook contracts should use the
* `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param params Swap parameters (see PoolSwapParams for struct definition)
* @param pool Pool address, used to get pool information from the Vault (poolData, token config, etc.)
* @return success True if the pool wishes to proceed with settlement
*/
function onBeforeSwap(PoolSwapParams calldata params, address pool) external returns (bool success);
/**
* @notice Called after a swap to perform further actions once the balances have been updated by the swap.
* @dev Called if the `shouldCallAfterSwap` flag is set in the configuration. The Vault will ignore
* `hookAdjustedAmountCalculatedRaw` unless `enableHookAdjustedAmounts` is true. Hook contracts should
* use the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param params Swap parameters (see above for struct definition)
* @return success True if the pool wishes to proceed with settlement
* @return hookAdjustedAmountCalculatedRaw New amount calculated, potentially modified by the hook
*/
function onAfterSwap(
AfterSwapParams calldata params
) external returns (bool success, uint256 hookAdjustedAmountCalculatedRaw);
/**
* @notice Called after `onBeforeSwap` and before the main swap operation, if the pool has dynamic fees.
* @dev Called if the `shouldCallComputeDynamicSwapFee` flag is set in the configuration. Hook contracts should use
* the `onlyVault` modifier to guarantee this is only called by the Vault.
*
* @param params Swap parameters (see PoolSwapParams for struct definition)
* @param pool Pool address, used to get pool information from the Vault (poolData, token config, etc.)
* @param staticSwapFeePercentage 18-decimal FP value of the static swap fee percentage, for reference
* @return success True if the pool wishes to proceed with settlement
* @return dynamicSwapFeePercentage Value of the swap fee percentage, as an 18-decimal FP value
*/
function onComputeDynamicSwapFeePercentage(
PoolSwapParams calldata params,
address pool,
uint256 staticSwapFeePercentage
) external view returns (bool success, uint256 dynamicSwapFeePercentage);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IVault } from "./IVault.sol";
/// @notice Contract that handles protocol and pool creator fees for the Vault.
interface IProtocolFeeController {
/**
* @notice Emitted when the protocol swap fee percentage is updated.
* @param swapFeePercentage The updated protocol swap fee percentage
*/
event GlobalProtocolSwapFeePercentageChanged(uint256 swapFeePercentage);
/**
* @notice Emitted when the protocol yield fee percentage is updated.
* @param yieldFeePercentage The updated protocol yield fee percentage
*/
event GlobalProtocolYieldFeePercentageChanged(uint256 yieldFeePercentage);
/**
* @notice Emitted when the protocol swap fee percentage is updated for a specific pool.
* @param pool The pool whose protocol swap fee will be changed
* @param swapFeePercentage The updated protocol swap fee percentage
*/
event ProtocolSwapFeePercentageChanged(address indexed pool, uint256 swapFeePercentage);
/**
* @notice Emitted when the protocol yield fee percentage is updated for a specific pool.
* @param pool The pool whose protocol yield fee will be changed
* @param yieldFeePercentage The updated protocol yield fee percentage
*/
event ProtocolYieldFeePercentageChanged(address indexed pool, uint256 yieldFeePercentage);
/**
* @notice Emitted when the pool creator swap fee percentage of a pool is updated.
* @param pool The pool whose pool creator swap fee will be changed
* @param poolCreatorSwapFeePercentage The new pool creator swap fee percentage for the pool
*/
event PoolCreatorSwapFeePercentageChanged(address indexed pool, uint256 poolCreatorSwapFeePercentage);
/**
* @notice Emitted when the pool creator yield fee percentage of a pool is updated.
* @param pool The pool whose pool creator yield fee will be changed
* @param poolCreatorYieldFeePercentage The new pool creator yield fee percentage for the pool
*/
event PoolCreatorYieldFeePercentageChanged(address indexed pool, uint256 poolCreatorYieldFeePercentage);
/**
* @notice Logs the collection of protocol swap fees in a specific token and amount.
* @dev Note that since charging protocol fees (i.e., distributing tokens between pool and fee balances) occurs
* in the Vault, but fee collection happens in the ProtocolFeeController, the swap fees reported here may encompass
* multiple operations.
*
* @param pool The pool on which the swap fee was charged
* @param token The token in which the swap fee was charged
* @param amount The amount of the token collected in fees
*/
event ProtocolSwapFeeCollected(address indexed pool, IERC20 indexed token, uint256 amount);
/**
* @notice Logs the collection of protocol yield fees in a specific token and amount.
* @dev Note that since charging protocol fees (i.e., distributing tokens between pool and fee balances) occurs
* in the Vault, but fee collection happens in the ProtocolFeeController, the yield fees reported here may encompass
* multiple operations.
*
* @param pool The pool on which the yield fee was charged
* @param token The token in which the yield fee was charged
* @param amount The amount of the token collected in fees
*/
event ProtocolYieldFeeCollected(address indexed pool, IERC20 indexed token, uint256 amount);
/**
* @notice Logs the withdrawal of protocol fees in a specific token and amount.
* @param pool The pool from which protocol fees are being withdrawn
* @param token The token being withdrawn
* @param recipient The recipient of the funds
* @param amount The amount of the fee token that was withdrawn
*/
event ProtocolFeesWithdrawn(address indexed pool, IERC20 indexed token, address indexed recipient, uint256 amount);
/**
* @notice Logs the withdrawal of pool creator fees in a specific token and amount.
* @param pool The pool from which pool creator fees are being withdrawn
* @param token The token being withdrawn
* @param recipient The recipient of the funds (the pool creator if permissionless, or another account)
* @param amount The amount of the fee token that was withdrawn
*/
event PoolCreatorFeesWithdrawn(
address indexed pool,
IERC20 indexed token,
address indexed recipient,
uint256 amount
);
/**
* @notice Error raised when the protocol swap fee percentage exceeds the maximum allowed value.
* @dev Note that this is checked for both the global and pool-specific protocol swap fee percentages.
*/
error ProtocolSwapFeePercentageTooHigh();
/**
* @notice Error raised when the protocol yield fee percentage exceeds the maximum allowed value.
* @dev Note that this is checked for both the global and pool-specific protocol yield fee percentages.
*/
error ProtocolYieldFeePercentageTooHigh();
/**
* @notice Error raised if there is no pool creator on a withdrawal attempt from the given pool.
* @param pool The pool with no creator
*/
error PoolCreatorNotRegistered(address pool);
/**
* @notice Error raised if the wrong account attempts to withdraw pool creator fees.
* @param caller The account attempting to withdraw pool creator fees
* @param pool The pool the caller tried to withdraw from
*/
error CallerIsNotPoolCreator(address caller, address pool);
/// @notice Error raised when the pool creator swap or yield fee percentage exceeds the maximum allowed value.
error PoolCreatorFeePercentageTooHigh();
/**
* @notice Get the address of the main Vault contract.
* @return vault The Vault address
*/
function vault() external view returns (IVault);
/**
* @notice Collects aggregate fees from the Vault for a given pool.
* @param pool The pool with aggregate fees
*/
function collectAggregateFees(address pool) external;
/**
* @notice Getter for the current global protocol swap fee.
* @return protocolSwapFeePercentage The global protocol swap fee percentage
*/
function getGlobalProtocolSwapFeePercentage() external view returns (uint256 protocolSwapFeePercentage);
/**
* @notice Getter for the current global protocol yield fee.
* @return protocolYieldFeePercentage The global protocol yield fee percentage
*/
function getGlobalProtocolYieldFeePercentage() external view returns (uint256 protocolYieldFeePercentage);
/**
* @notice Getter for the current protocol swap fee for a given pool.
* @param pool The address of the pool
* @return protocolSwapFeePercentage The global protocol swap fee percentage
* @return isOverride True if the protocol fee has been overridden
*/
function getPoolProtocolSwapFeeInfo(
address pool
) external view returns (uint256 protocolSwapFeePercentage, bool isOverride);
/**
* @notice Getter for the current protocol yield fee for a given pool.
* @param pool The address of the pool
* @return protocolYieldFeePercentage The global protocol yield fee percentage
* @return isOverride True if the protocol fee has been overridden
*/
function getPoolProtocolYieldFeeInfo(
address pool
) external view returns (uint256 protocolYieldFeePercentage, bool isOverride);
/**
* @notice Returns the amount of each pool token allocated to the protocol for withdrawal.
* @dev Includes both swap and yield fees.
* @param pool The address of the pool on which fees were collected
* @return feeAmounts The total amounts of each token available for withdrawal, sorted in token registration order
*/
function getProtocolFeeAmounts(address pool) external view returns (uint256[] memory feeAmounts);
/**
* @notice Returns the amount of each pool token allocated to the pool creator for withdrawal.
* @dev Includes both swap and yield fees.
* @param pool The address of the pool on which fees were collected
* @return feeAmounts The total amounts of each token available for withdrawal, sorted in token registration order
*/
function getPoolCreatorFeeAmounts(address pool) external view returns (uint256[] memory feeAmounts);
/**
* @notice Returns a calculated aggregate percentage from protocol and pool creator fee percentages.
* @dev Not tied to any particular pool; this just performs the low-level "additive fee" calculation. Note that
* pool creator fees are calculated based on creatorAndLpFees, and not in totalFees. Since aggregate fees are
* stored in the Vault with 24-bit precision, this will truncate any values that require greater precision.
* It is expected that pool creators will negotiate with the DAO and agree on reasonable values for these fee
* components, but the truncation ensures it will not revert for any valid set of fee percentages.
*
* See example below:
*
* tokenOutAmount = 10000; poolSwapFeePct = 10%; protocolFeePct = 40%; creatorFeePct = 60%
* totalFees = tokenOutAmount * poolSwapFeePct = 10000 * 10% = 1000
* protocolFees = totalFees * protocolFeePct = 1000 * 40% = 400
* creatorAndLpFees = totalFees - protocolFees = 1000 - 400 = 600
* creatorFees = creatorAndLpFees * creatorFeePct = 600 * 60% = 360
* lpFees (will stay in the pool) = creatorAndLpFees - creatorFees = 600 - 360 = 240
*
* @param protocolFeePercentage The protocol portion of the aggregate fee percentage
* @param poolCreatorFeePercentage The pool creator portion of the aggregate fee percentage
* @return aggregateFeePercentage The computed aggregate percentage
*/
function computeAggregateFeePercentage(
uint256 protocolFeePercentage,
uint256 poolCreatorFeePercentage
) external pure returns (uint256 aggregateFeePercentage);
/**
* @notice Override the protocol swap fee percentage for a specific pool.
* @dev This is a permissionless call, and will set the pool's fee to the current global fee, if it is different
* from the current value, and the fee is not controlled by governance (i.e., has never been overridden).
*
* @param pool The pool for which we are setting the protocol swap fee
*/
function updateProtocolSwapFeePercentage(address pool) external;
/**
* @notice Override the protocol yield fee percentage for a specific pool.
* @dev This is a permissionless call, and will set the pool's fee to the current global fee, if it is different
* from the current value, and the fee is not controlled by governance (i.e., has never been overridden).
*
* @param pool The pool for which we are setting the protocol yield fee
*/
function updateProtocolYieldFeePercentage(address pool) external;
/***************************************************************************
Permissioned Functions
***************************************************************************/
/**
* @notice Add pool-specific entries to the protocol swap and yield percentages.
* @dev This must be called from the Vault during pool registration. It will initialize the pool to the global
* protocol fee percentage values (or 0, if the `protocolFeeExempt` flags is set), and return the initial aggregate
* fee percentages, based on an initial pool creator fee of 0.
*
* @param pool The address of the pool being registered
* @param poolCreator The address of the pool creator (or 0 if there won't be a pool creator fee)
* @param protocolFeeExempt If true, the pool is initially exempt from protocol fees
* @return aggregateSwapFeePercentage The initial aggregate swap fee percentage
* @return aggregateYieldFeePercentage The initial aggregate yield fee percentage
*/
function registerPool(
address pool,
address poolCreator,
bool protocolFeeExempt
) external returns (uint256 aggregateSwapFeePercentage, uint256 aggregateYieldFeePercentage);
/**
* @notice Set the global protocol swap fee percentage, used by standard pools.
* @param newProtocolSwapFeePercentage The new protocol swap fee percentage
*/
function setGlobalProtocolSwapFeePercentage(uint256 newProtocolSwapFeePercentage) external;
/**
* @notice Set the global protocol yield fee percentage, used by standard pools.
* @param newProtocolYieldFeePercentage The new protocol yield fee percentage
*/
function setGlobalProtocolYieldFeePercentage(uint256 newProtocolYieldFeePercentage) external;
/**
* @notice Override the protocol swap fee percentage for a specific pool.
* @param pool The address of the pool for which we are setting the protocol swap fee
* @param newProtocolSwapFeePercentage The new protocol swap fee percentage for the pool
*/
function setProtocolSwapFeePercentage(address pool, uint256 newProtocolSwapFeePercentage) external;
/**
* @notice Override the protocol yield fee percentage for a specific pool.
* @param pool The address of the pool for which we are setting the protocol yield fee
* @param newProtocolYieldFeePercentage The new protocol yield fee percentage for the pool
*/
function setProtocolYieldFeePercentage(address pool, uint256 newProtocolYieldFeePercentage) external;
/**
* @notice Assigns a new pool creator swap fee percentage to the specified pool.
* @dev Fees are divided between the protocol, pool creator, and LPs. The pool creator percentage is applied to
* the "net" amount after protocol fees, and divides the remainder between the pool creator and LPs. If the
* pool creator fee is near 100%, almost none of the fee amount remains in the pool for LPs.
*
* @param pool The address of the pool for which the pool creator fee will be changed
* @param poolCreatorSwapFeePercentage The new pool creator swap fee percentage to apply to the pool
*/
function setPoolCreatorSwapFeePercentage(address pool, uint256 poolCreatorSwapFeePercentage) external;
/**
* @notice Assigns a new pool creator yield fee percentage to the specified pool.
* @dev Fees are divided between the protocol, pool creator, and LPs. The pool creator percentage is applied to
* the "net" amount after protocol fees, and divides the remainder between the pool creator and LPs. If the
* pool creator fee is near 100%, almost none of the fee amount remains in the pool for LPs.
*
* @param pool The address of the pool for which the pool creator fee will be changed
* @param poolCreatorYieldFeePercentage The new pool creator yield fee percentage to apply to the pool
*/
function setPoolCreatorYieldFeePercentage(address pool, uint256 poolCreatorYieldFeePercentage) external;
/**
* @notice Withdraw collected protocol fees for a given pool (all tokens). This is a permissioned function.
* @dev Sends swap and yield protocol fees to the recipient.
* @param pool The pool on which fees were collected
* @param recipient Address to send the tokens
*/
function withdrawProtocolFees(address pool, address recipient) external;
/**
* @notice Withdraw collected protocol fees for a given pool and a given token. This is a permissioned function.
* @dev Sends swap and yield protocol fees to the recipient.
* @param pool The pool on which fees were collected
* @param recipient Address to send the tokens
* @param token Token to withdraw
*/
function withdrawProtocolFeesForToken(address pool, address recipient, IERC20 token) external;
/**
* @notice Withdraw collected pool creator fees for a given pool. This is a permissioned function.
* @dev Sends swap and yield pool creator fees to the recipient.
* @param pool The pool on which fees were collected
* @param recipient Address to send the tokens
*/
function withdrawPoolCreatorFees(address pool, address recipient) external;
/**
* @notice Withdraw collected pool creator fees for a given pool.
* @dev Sends swap and yield pool creator fees to the registered poolCreator. Since this is a known and immutable
* value, this function is permissionless.
*
* @param pool The pool on which fees were collected
*/
function withdrawPoolCreatorFees(address pool) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/**
* @notice Return the minimum/maximum swap fee percentages for a pool.
* @dev The Vault does not enforce bounds on swap fee percentages; `IBasePool` implements this interface to ensure
* that new pool developers think about and set these bounds according to their specific pool type.
*
* A minimum swap fee might be necessary to ensure mathematical soundness (e.g., Weighted Pools, which use the power
* function in the invariant). A maximum swap fee is general protection for users. With no limits at the Vault level,
* a pool could specify a near 100% swap fee, effectively disabling trading. Though there are some use cases, such as
* LVR/MEV strategies, where a very high fee makes sense.
*
* Note that the Vault does ensure that dynamic and aggregate fees are less than 100% to prevent attempting to allocate
* more fees than were collected by the operation. The true `MAX_FEE_PERCENTAGE` is defined in VaultTypes.sol, and is
* the highest value below 100% that satisfies the precision requirements.
*/
interface ISwapFeePercentageBounds {
/// @return minimumSwapFeePercentage The minimum swap fee percentage for a pool
function getMinimumSwapFeePercentage() external view returns (uint256 minimumSwapFeePercentage);
/// @return maximumSwapFeePercentage The maximum swap fee percentage for a pool
function getMaximumSwapFeePercentage() external view returns (uint256 maximumSwapFeePercentage);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
/**
* @notice Return the minimum/maximum invariant ratios allowed during an unbalanced liquidity operation.
* @dev The Vault does not enforce any "baseline" bounds on invariant ratios, since such bounds are highly specific
* and dependent on the math of each pool type. Instead, the Vault reads invariant ratio bounds from the pools.
* `IBasePool` implements this interface to ensure that new pool developers think about and set these bounds according
* to their pool type's math.
*
* For instance, Balancer Weighted Pool math involves exponentiation (the `pow` function), which uses natural
* logarithms and a discrete Taylor series expansion to compute x^y values for the 18-decimal floating point numbers
* used in all Vault computations. See `LogExpMath` and `WeightedMath` for a derivation of the bounds for these pools.
*/
interface IUnbalancedLiquidityInvariantRatioBounds {
/// @return minimumInvariantRatio The minimum invariant ratio for a pool during unbalanced remove liquidity
function getMinimumInvariantRatio() external view returns (uint256 minimumInvariantRatio);
/// @return maximumInvariantRatio The maximum invariant ratio for a pool during unbalanced add liquidity
function getMaximumInvariantRatio() external view returns (uint256 maximumInvariantRatio);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IAuthentication } from "../solidity-utils/helpers/IAuthentication.sol";
import { IVaultExtension } from "./IVaultExtension.sol";
import { IVaultErrors } from "./IVaultErrors.sol";
import { IVaultEvents } from "./IVaultEvents.sol";
import { IVaultAdmin } from "./IVaultAdmin.sol";
import { IVaultMain } from "./IVaultMain.sol";
/// @notice Composite interface for all Vault operations: swap, add/remove liquidity, and associated queries.
interface IVault is IVaultMain, IVaultExtension, IVaultAdmin, IVaultErrors, IVaultEvents, IAuthentication {
/// @return vault The main Vault address.
function vault() external view override(IVaultAdmin, IVaultExtension) returns (IVault);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import { IProtocolFeeController } from "./IProtocolFeeController.sol";
import { IAuthorizer } from "./IAuthorizer.sol";
import { IVault } from "./IVault.sol";
/**
* @notice Interface for functions defined on the `VaultAdmin` contract.
* @dev `VaultAdmin` is the Proxy extension of `VaultExtension`, and handles the least critical operations,
* as two delegate calls add gas to each call. Most of the permissioned calls are here.
*/
interface IVaultAdmin {
/*******************************************************************************
Constants and immutables
*******************************************************************************/
/**
* @notice Returns the main Vault address.
* @dev The main Vault contains the entrypoint and main liquidity operation implementations.
* @return vault The address of the main Vault
*/
function vault() external view returns (IVault);
/**
* @notice Returns the Vault's pause window end time.
* @dev This value is immutable, and represents the timestamp after which the Vault can no longer be paused
* by governance. Balancer timestamps are 32 bits.
*
* @return pauseWindowEndTime The timestamp when the Vault's pause window ends
*/
function getPauseWindowEndTime() external view returns (uint32 pauseWindowEndTime);
/**
* @notice Returns the Vault's buffer period duration.
* @dev This value is immutable. It represents the period during which, if paused, the Vault will remain paused.
* This ensures there is time available to address whatever issue caused the Vault to be paused. Balancer
* timestamps are 32 bits.
*
* @return bufferPeriodDuration The length of the buffer period in seconds
*/
function getBufferPeriodDuration() external view returns (uint32 bufferPeriodDuration);
/**
* @notice Returns the Vault's buffer period end time.
* @dev This value is immutable. If already paused, the Vault can be unpaused until this timestamp. Balancer
* timestamps are 32 bits.
*
* @return bufferPeriodEndTime The timestamp after which the Vault remains permanently unpaused
*/
function getBufferPeriodEndTime() external view returns (uint32 bufferPeriodEndTime);
/**
* @notice Get the minimum number of tokens in a pool.
* @dev We expect the vast majority of pools to be 2-token.
* @return minTokens The minimum token count of a pool
*/
function getMinimumPoolTokens() external pure returns (uint256 minTokens);
/**
* @notice Get the maximum number of tokens in a pool.
* @return maxTokens The maximum token count of a pool
*/
function getMaximumPoolTokens() external pure returns (uint256 maxTokens);
/**
* @notice Get the minimum total supply of pool tokens (BPT) for an initialized pool.
* @dev This prevents pools from being completely drained. When the pool is initialized, this minimum amount of BPT
* is minted to the zero address. This is an 18-decimal floating point number; BPT are always 18 decimals.
*
* @return poolMinimumTotalSupply The minimum total supply a pool can have after initialization
*/
function getPoolMinimumTotalSupply() external pure returns (uint256 poolMinimumTotalSupply);
/**
* @notice Get the minimum total supply of an ERC4626 wrapped token buffer in the Vault.
* @dev This prevents buffers from being completely drained. When the buffer is initialized, this minimum number
* of shares is added to the shares resulting from the initial deposit. Buffer total supply accounting is internal
* to the Vault, as buffers are not tokenized.
*
* @return bufferMinimumTotalSupply The minimum total supply a buffer can have after initialization
*/
function getBufferMinimumTotalSupply() external pure returns (uint256 bufferMinimumTotalSupply);
/**
* @notice Get the minimum trade amount in a pool operation.
* @dev This limit is applied to the 18-decimal "upscaled" amount in any operation (swap, add/remove liquidity).
* @return minimumTradeAmount The minimum trade amount as an 18-decimal floating point number
*/
function getMinimumTradeAmount() external view returns (uint256 minimumTradeAmount);
/**
* @notice Get the minimum wrap amount in a buffer operation.
* @dev This limit is applied to the wrap operation amount, in native underlying token decimals.
* @return minimumWrapAmount The minimum wrap amount in native underlying token decimals
*/
function getMinimumWrapAmount() external view returns (uint256 minimumWrapAmount);
/*******************************************************************************
Vault Pausing
*******************************************************************************/
/**
* @notice Indicates whether the Vault is paused.
* @dev If the Vault is paused, all non-Recovery Mode state-changing operations on pools will revert. Note that
* ERC4626 buffers and the Vault have separate and independent pausing mechanisms. Pausing the Vault does not
* also pause buffers (though we anticipate they would likely be paused and unpaused together). Call
* `areBuffersPaused` to check the pause state of the buffers.
*
* @return vaultPaused True if the Vault is paused
*/
function isVaultPaused() external view returns (bool vaultPaused);
/**
* @notice Returns the paused status, and end times of the Vault's pause window and buffer period.
* @dev Balancer timestamps are 32 bits.
* @return vaultPaused True if the Vault is paused
* @return vaultPauseWindowEndTime The timestamp of the end of the Vault's pause window
* @return vaultBufferPeriodEndTime The timestamp of the end of the Vault's buffer period
*/
function getVaultPausedState()
external
view
returns (bool vaultPaused, uint32 vaultPauseWindowEndTime, uint32 vaultBufferPeriodEndTime);
/**
* @notice Pause the Vault: an emergency action which disables all operational state-changing functions on pools.
* @dev This is a permissioned function that will only work during the Pause Window set during deployment.
* Note that ERC4626 buffer operations have an independent pause mechanism, which is not affected by pausing
* the Vault. Custom routers could still wrap/unwrap using buffers while the Vault is paused, unless buffers
* are also paused (with `pauseVaultBuffers`).
*/
function pauseVault() external;
/**
* @notice Reverse a `pause` operation, and restore Vault pool operations to normal functionality.
* @dev This is a permissioned function that will only work on a paused Vault within the Buffer Period set during
* deployment. Note that the Vault will automatically unpause after the Buffer Period expires. As noted above,
* ERC4626 buffers and Vault operations on pools are independent. Unpausing the Vault does not reverse
* `pauseVaultBuffers`. If buffers were also paused, they will remain in that state until explicitly unpaused.
*/
function unpauseVault() external;
/*******************************************************************************
Pool Pausing
*******************************************************************************/
/**
* @notice Pause the Pool: an emergency action which disables all pool functions.
* @dev This is a permissioned function that will only work during the Pause Window set during pool factory
* deployment.
*
* @param pool The pool being paused
*/
function pausePool(address pool) external;
/**
* @notice Reverse a `pause` operation, and restore the Pool to normal functionality.
* @dev This is a permissioned function that will only work on a paused Pool within the Buffer Period set during
* deployment. Note that the Pool will automatically unpause after the Buffer Period expires.
*
* @param pool The pool being unpaused
*/
function unpausePool(address pool) external;
/*******************************************************************************
Fees
*******************************************************************************/
/**
* @notice Assigns a new static swap fee percentage to the specified pool.
* @dev This is a permissioned function, disabled if the pool is paused. The swap fee percentage must be within
* the bounds specified by the pool's implementation of `ISwapFeePercentageBounds`.
* Emits the SwapFeePercentageChanged event.
*
* @param pool The address of the pool for which the static swap fee will be changed
* @param swapFeePercentage The new swap fee percentage to apply to the pool
*/
function setStaticSwapFeePercentage(address pool, uint256 swapFeePercentage) external;
/**
* @notice Collects accumulated aggregate swap and yield fees for the specified pool.
* @dev Fees are sent to the ProtocolFeeController address.
* @param pool The pool on which all aggregate fees should be collected
* @return swapFeeAmounts An array with the total swap fees collected, sorted in token registration order
* @return yieldFeeAmounts An array with the total yield fees collected, sorted in token registration order
*/
function collectAggregateFees(
address pool
) external returns (uint256[] memory swapFeeAmounts, uint256[] memory yieldFeeAmounts);
/**
* @notice Update an aggregate swap fee percentage.
* @dev Can only be called by the current protocol fee controller. Called when governance overrides a protocol fee
* for a specific pool, or to permissionlessly update a pool to a changed global protocol fee value (if the pool's
* fee has not previously been set by governance). Ensures the aggregate percentage <= FixedPoint.ONE, and also
* that the final value does not lose precision when stored in 24 bits (see `FEE_BITLENGTH` in VaultTypes.sol).
* Emits an `AggregateSwapFeePercentageChanged` event.
*
* @param pool The pool whose swap fee percentage will be updated
* @param newAggregateSwapFeePercentage The new aggregate swap fee percentage
*/
function updateAggregateSwapFeePercentage(address pool, uint256 newAggregateSwapFeePercentage) external;
/**
* @notice Update an aggregate yield fee percentage.
* @dev Can only be called by the current protocol fee controller. Called when governance overrides a protocol fee
* for a specific pool, or to permissionlessly update a pool to a changed global protocol fee value (if the pool's
* fee has not previously been set by governance). Ensures the aggregate percentage <= FixedPoint.ONE, and also
* that the final value does not lose precision when stored in 24 bits (see `FEE_BITLENGTH` in VaultTypes.sol).
* Emits an `AggregateYieldFeePercentageChanged` event.
*
* @param pool The pool whose yield fee percentage will be updated
* @param newAggregateYieldFeePercentage The new aggregate yield fee percentage
*/
function updateAggregateYieldFeePercentage(address pool, uint256 newAggregateYieldFeePercentage) external;
/**
* @notice Sets a new Protocol Fee Controller for the Vault.
* @dev This is a permissioned call. Emits a `ProtocolFeeControllerChanged` event.
* @param newProtocolFeeController The address of the new Protocol Fee Controller
*/
function setProtocolFeeController(IProtocolFeeController newProtocolFeeController) external;
/*******************************************************************************
Recovery Mode
*******************************************************************************/
/**
* @notice Enable recovery mode for a pool.
* @dev This is a permissioned function. It enables a safe proportional withdrawal, with no external calls.
* Since there are no external calls, ensuring that entering Recovery Mode cannot fail, we cannot compute and so
* must forfeit any yield fees between the last operation and enabling Recovery Mode. For the same reason, live
* balances cannot be updated while in Recovery Mode, as doing so might cause withdrawals to fail.
*
* @param pool The address of the pool
*/
function enableRecoveryMode(address pool) external;
/**
* @notice Disable recovery mode for a pool.
* @dev This is a permissioned function. It re-syncs live balances (which could not be updated during
* Recovery Mode), forfeiting any yield fees that accrued while enabled. It makes external calls, and could
* potentially fail if there is an issue with any associated Rate Providers.
*
* @param pool The address of the pool
*/
function disableRecoveryMode(address pool) external;
/*******************************************************************************
Query Functionality
*******************************************************************************/
/**
* @notice Disables query functionality on the Vault. Can only be called by governance.
* @dev The query functions rely on a specific EVM feature to detect static calls. Query operations are exempt from
* settlement constraints, so it's critical that no state changes can occur. We retain the ability to disable
* queries in the unlikely event that EVM changes violate its assumptions (perhaps on an L2).
* This function can be acted upon as an emergency measure in ambiguous contexts where it's not 100% clear whether
* disabling queries is completely necessary; queries can still be re-enabled after this call.
*/
function disableQuery() external;
/**
* @notice Disables query functionality permanently on the Vault. Can only be called by governance.
* @dev Shall only be used when there is no doubt that queries pose a fundamental threat to the system.
*/
function disableQueryPermanently() external;
/**
* @notice Enables query functionality on the Vault. Can only be called by governance.
* @dev Only works if queries are not permanently disabled.
*/
function enableQuery() external;
/*******************************************************************************
ERC4626 Buffers
*******************************************************************************/
/**
* @notice Indicates whether the Vault buffers are paused.
* @dev When buffers are paused, all buffer operations (i.e., calls on the Router with `isBuffer` true)
* will revert. Pausing buffers is reversible. Note that ERC4626 buffers and the Vault have separate and
* independent pausing mechanisms. Pausing the Vault does not also pause buffers (though we anticipate they
* would likely be paused and unpaused together). Call `isVaultPaused` to check the pause state of the Vault.
*
* @return buffersPaused True if the Vault buffers are paused
*/
function areBuffersPaused() external view returns (bool buffersPaused);
/**
* @notice Pauses native vault buffers globally.
* @dev When buffers are paused, it's not possible to add liquidity or wrap/unwrap tokens using the Vault's
* `erc4626BufferWrapOrUnwrap` primitive. However, it's still possible to remove liquidity. Currently it's not
* possible to pause vault buffers individually.
*
* This is a permissioned call, and is reversible (see `unpauseVaultBuffers`). Note that the Vault has a separate
* and independent pausing mechanism. It is possible to pause the Vault (i.e. pool operations), without affecting
* buffers, and vice versa.
*/
function pauseVaultBuffers() external;
/**
* @notice Unpauses native vault buffers globally.
* @dev When buffers are paused, it's not possible to add liquidity or wrap/unwrap tokens using the Vault's
* `erc4626BufferWrapOrUnwrap` primitive. However, it's still possible to remove liquidity. As noted above,
* ERC4626 buffers and Vault operations on pools are independent. Unpausing buffers does not reverse `pauseVault`.
* If the Vault was also paused, it will remain in that state until explicitly unpaused.
*
* This is a permissioned call.
*/
function unpauseVaultBuffers() external;
/**
* @notice Initializes buffer for the given wrapped token.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @param amountUnderlyingRaw Amount of underlying tokens that will be deposited into the buffer
* @param amountWrappedRaw Amount of wrapped tokens that will be deposited into the buffer
* @param minIssuedShares Minimum amount of shares to receive from the buffer, expressed in underlying token
* native decimals
* @param sharesOwner Address that will own the deposited liquidity. Only this address will be able to remove
* liquidity from the buffer
* @return issuedShares the amount of tokens sharesOwner has in the buffer, expressed in underlying token amounts.
* (it is the BPT of an internal ERC4626 buffer). It is expressed in underlying token native decimals.
*/
function initializeBuffer(
IERC4626 wrappedToken,
uint256 amountUnderlyingRaw,
uint256 amountWrappedRaw,
uint256 minIssuedShares,
address sharesOwner
) external returns (uint256 issuedShares);
/**
* @notice Adds liquidity to an internal ERC4626 buffer in the Vault, proportionally.
* @dev The buffer needs to be initialized beforehand.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @param maxAmountUnderlyingInRaw Maximum amount of underlying tokens to add to the buffer. It is expressed in
* underlying token native decimals
* @param maxAmountWrappedInRaw Maximum amount of wrapped tokens to add to the buffer. It is expressed in wrapped
* token native decimals
* @param exactSharesToIssue The value in underlying tokens that `sharesOwner` wants to add to the buffer,
* in underlying token decimals
* @param sharesOwner Address that will own the deposited liquidity. Only this address will be able to remove
* liquidity from the buffer
* @return amountUnderlyingRaw Amount of underlying tokens deposited into the buffer
* @return amountWrappedRaw Amount of wrapped tokens deposited into the buffer
*/
function addLiquidityToBuffer(
IERC4626 wrappedToken,
uint256 maxAmountUnderlyingInRaw,
uint256 maxAmountWrappedInRaw,
uint256 exactSharesToIssue,
address sharesOwner
) external returns (uint256 amountUnderlyingRaw, uint256 amountWrappedRaw);
/**
* @notice Removes liquidity from an internal ERC4626 buffer in the Vault.
* @dev Only proportional exits are supported, and the sender has to be the owner of the shares.
* This function unlocks the Vault just for this operation; it does not work with a Router as an entrypoint.
*
* Pre-conditions:
* - The buffer needs to be initialized.
* - sharesOwner is the original msg.sender, it needs to be checked in the Router. That's why
* this call is authenticated; only routers approved by the DAO can remove the liquidity of a buffer.
* - The buffer needs to have some liquidity and have its asset registered in `_bufferAssets` storage.
*
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @param sharesToRemove Amount of shares to remove from the buffer. Cannot be greater than sharesOwner's
* total shares. It is expressed in underlying token native decimals
* @param minAmountUnderlyingOutRaw Minimum amount of underlying tokens to receive from the buffer. It is expressed
* in underlying token native decimals
* @param minAmountWrappedOutRaw Minimum amount of wrapped tokens to receive from the buffer. It is expressed in
* wrapped token native decimals
* @return removedUnderlyingBalanceRaw Amount of underlying tokens returned to the user
* @return removedWrappedBalanceRaw Amount of wrapped tokens returned to the user
*/
function removeLiquidityFromBuffer(
IERC4626 wrappedToken,
uint256 sharesToRemove,
uint256 minAmountUnderlyingOutRaw,
uint256 minAmountWrappedOutRaw
) external returns (uint256 removedUnderlyingBalanceRaw, uint256 removedWrappedBalanceRaw);
/**
* @notice Returns the asset registered for a given wrapped token.
* @dev The asset can never change after buffer initialization.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @return underlyingToken Address of the underlying token registered for the wrapper; `address(0)` if the buffer
* has not been initialized.
*/
function getBufferAsset(IERC4626 wrappedToken) external view returns (address underlyingToken);
/**
* @notice Returns the shares (internal buffer BPT) of a liquidity owner: a user that deposited assets
* in the buffer.
*
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @param liquidityOwner Address of the user that owns liquidity in the wrapped token's buffer
* @return ownerShares Amount of shares allocated to the liquidity owner, in native underlying token decimals
*/
function getBufferOwnerShares(
IERC4626 wrappedToken,
address liquidityOwner
) external view returns (uint256 ownerShares);
/**
* @notice Returns the supply shares (internal buffer BPT) of the ERC4626 buffer.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @return bufferShares Amount of supply shares of the buffer, in native underlying token decimals
*/
function getBufferTotalShares(IERC4626 wrappedToken) external view returns (uint256 bufferShares);
/**
* @notice Returns the amount of underlying and wrapped tokens deposited in the internal buffer of the Vault.
* @dev All values are in native token decimals of the wrapped or underlying tokens.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @return underlyingBalanceRaw Amount of underlying tokens deposited into the buffer, in native token decimals
* @return wrappedBalanceRaw Amount of wrapped tokens deposited into the buffer, in native token decimals
*/
function getBufferBalance(
IERC4626 wrappedToken
) external view returns (uint256 underlyingBalanceRaw, uint256 wrappedBalanceRaw);
/*******************************************************************************
Authentication
*******************************************************************************/
/**
* @notice Sets a new Authorizer for the Vault.
* @dev This is a permissioned call. Emits an `AuthorizerChanged` event.
* @param newAuthorizer The address of the new authorizer
*/
function setAuthorizer(IAuthorizer newAuthorizer) external;
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
/// @notice Errors are declared inside an interface (namespace) to improve DX with Typechain.
interface IVaultErrors {
/*******************************************************************************
Registration and Initialization
*******************************************************************************/
/**
* @notice A pool has already been registered. `registerPool` may only be called once.
* @param pool The already registered pool
*/
error PoolAlreadyRegistered(address pool);
/**
* @notice A pool has already been initialized. `initialize` may only be called once.
* @param pool The already initialized pool
*/
error PoolAlreadyInitialized(address pool);
/**
* @notice A pool has not been registered.
* @param pool The unregistered pool
*/
error PoolNotRegistered(address pool);
/**
* @notice A referenced pool has not been initialized.
* @param pool The uninitialized pool
*/
error PoolNotInitialized(address pool);
/**
* @notice A hook contract rejected a pool on registration.
* @param poolHooksContract Address of the hook contract that rejected the pool registration
* @param pool Address of the rejected pool
* @param poolFactory Address of the pool factory
*/
error HookRegistrationFailed(address poolHooksContract, address pool, address poolFactory);
/**
* @notice A token was already registered (i.e., it is a duplicate in the pool).
* @param token The duplicate token
*/
error TokenAlreadyRegistered(IERC20 token);
/// @notice The token count is below the minimum allowed.
error MinTokens();
/// @notice The token count is above the maximum allowed.
error MaxTokens();
/// @notice Invalid tokens (e.g., zero) cannot be registered.
error InvalidToken();
/// @notice The token type given in a TokenConfig during pool registration is invalid.
error InvalidTokenType();
/// @notice The data in a TokenConfig struct is inconsistent or unsupported.
error InvalidTokenConfiguration();
/// @notice Tokens with more than 18 decimals are not supported.
error InvalidTokenDecimals();
/**
* @notice The token list passed into an operation does not match the pool tokens in the pool.
* @param pool Address of the pool
* @param expectedToken The correct token at a given index in the pool
* @param actualToken The actual token found at that index
*/
error TokensMismatch(address pool, address expectedToken, address actualToken);
/*******************************************************************************
Transient Accounting
*******************************************************************************/
/// @notice A transient accounting operation completed with outstanding token deltas.
error BalanceNotSettled();
/// @notice A user called a Vault function (swap, add/remove liquidity) outside the lock context.
error VaultIsNotUnlocked();
/// @notice The pool has returned false to the beforeSwap hook, indicating the transaction should revert.
error DynamicSwapFeeHookFailed();
/// @notice The pool has returned false to the beforeSwap hook, indicating the transaction should revert.
error BeforeSwapHookFailed();
/// @notice The pool has returned false to the afterSwap hook, indicating the transaction should revert.
error AfterSwapHookFailed();
/// @notice The pool has returned false to the beforeInitialize hook, indicating the transaction should revert.
error BeforeInitializeHookFailed();
/// @notice The pool has returned false to the afterInitialize hook, indicating the transaction should revert.
error AfterInitializeHookFailed();
/// @notice The pool has returned false to the beforeAddLiquidity hook, indicating the transaction should revert.
error BeforeAddLiquidityHookFailed();
/// @notice The pool has returned false to the afterAddLiquidity hook, indicating the transaction should revert.
error AfterAddLiquidityHookFailed();
/// @notice The pool has returned false to the beforeRemoveLiquidity hook, indicating the transaction should revert.
error BeforeRemoveLiquidityHookFailed();
/// @notice The pool has returned false to the afterRemoveLiquidity hook, indicating the transaction should revert.
error AfterRemoveLiquidityHookFailed();
/// @notice An unauthorized Router tried to call a permissioned function (i.e., using the Vault's token allowance).
error RouterNotTrusted();
/*******************************************************************************
Swaps
*******************************************************************************/
/// @notice The user tried to swap zero tokens.
error AmountGivenZero();
/// @notice The user attempted to swap a token for itself.
error CannotSwapSameToken();
/**
* @notice The user attempted to operate with a token that is not in the pool.
* @param token The unregistered token
*/
error TokenNotRegistered(IERC20 token);
/**
* @notice An amount in or out has exceeded the limit specified in the swap request.
* @param amount The total amount in or out
* @param limit The amount of the limit that has been exceeded
*/
error SwapLimit(uint256 amount, uint256 limit);
/**
* @notice A hook adjusted amount in or out has exceeded the limit specified in the swap request.
* @param amount The total amount in or out
* @param limit The amount of the limit that has been exceeded
*/
error HookAdjustedSwapLimit(uint256 amount, uint256 limit);
/// @notice The amount given or calculated for an operation is below the minimum limit.
error TradeAmountTooSmall();
/*******************************************************************************
Add Liquidity
*******************************************************************************/
/// @notice Add liquidity kind not supported.
error InvalidAddLiquidityKind();
/**
* @notice A required amountIn exceeds the maximum limit specified for the operation.
* @param tokenIn The incoming token
* @param amountIn The total token amount in
* @param maxAmountIn The amount of the limit that has been exceeded
*/
error AmountInAboveMax(IERC20 tokenIn, uint256 amountIn, uint256 maxAmountIn);
/**
* @notice A hook adjusted amountIn exceeds the maximum limit specified for the operation.
* @param tokenIn The incoming token
* @param amountIn The total token amount in
* @param maxAmountIn The amount of the limit that has been exceeded
*/
error HookAdjustedAmountInAboveMax(IERC20 tokenIn, uint256 amountIn, uint256 maxAmountIn);
/**
* @notice The BPT amount received from adding liquidity is below the minimum specified for the operation.
* @param amountOut The total BPT amount out
* @param minAmountOut The amount of the limit that has been exceeded
*/
error BptAmountOutBelowMin(uint256 amountOut, uint256 minAmountOut);
/// @notice Pool does not support adding liquidity with a customized input.
error DoesNotSupportAddLiquidityCustom();
/// @notice Pool does not support adding liquidity through donation.
error DoesNotSupportDonation();
/*******************************************************************************
Remove Liquidity
*******************************************************************************/
/// @notice Remove liquidity kind not supported.
error InvalidRemoveLiquidityKind();
/**
* @notice The actual amount out is below the minimum limit specified for the operation.
* @param tokenOut The outgoing token
* @param amountOut The total BPT amount out
* @param minAmountOut The amount of the limit that has been exceeded
*/
error AmountOutBelowMin(IERC20 tokenOut, uint256 amountOut, uint256 minAmountOut);
/**
* @notice The hook adjusted amount out is below the minimum limit specified for the operation.
* @param tokenOut The outgoing token
* @param amountOut The total BPT amount out
* @param minAmountOut The amount of the limit that has been exceeded
*/
error HookAdjustedAmountOutBelowMin(IERC20 tokenOut, uint256 amountOut, uint256 minAmountOut);
/**
* @notice The required BPT amount in exceeds the maximum limit specified for the operation.
* @param amountIn The total BPT amount in
* @param maxAmountIn The amount of the limit that has been exceeded
*/
error BptAmountInAboveMax(uint256 amountIn, uint256 maxAmountIn);
/// @notice Pool does not support removing liquidity with a customized input.
error DoesNotSupportRemoveLiquidityCustom();
/*******************************************************************************
Fees
*******************************************************************************/
/**
* @notice Error raised when there is an overflow in the fee calculation.
* @dev This occurs when the sum of the parts (aggregate swap or yield fee) is greater than the whole
* (total swap or yield fee). Also validated when the protocol fee controller updates aggregate fee
* percentages in the Vault.
*/
error ProtocolFeesExceedTotalCollected();
/**
* @notice Error raised when the swap fee percentage is less than the minimum allowed value.
* @dev The Vault itself does not impose a universal minimum. Rather, it validates against the
* range specified by the `ISwapFeePercentageBounds` interface. and reverts with this error
* if it is below the minimum value returned by the pool.
*
* Pools with dynamic fees do not check these limits.
*/
error SwapFeePercentageTooLow();
/**
* @notice Error raised when the swap fee percentage is greater than the maximum allowed value.
* @dev The Vault itself does not impose a universal minimum. Rather, it validates against the
* range specified by the `ISwapFeePercentageBounds` interface. and reverts with this error
* if it is above the maximum value returned by the pool.
*
* Pools with dynamic fees do not check these limits.
*/
error SwapFeePercentageTooHigh();
/**
* @notice Primary fee percentages result in an aggregate fee that cannot be stored with the required precision.
* @dev Primary fee percentages are 18-decimal values, stored here in 64 bits, and calculated with full 256-bit
* precision. However, the resulting aggregate fees are stored in the Vault with 24-bit precision, which
* corresponds to 0.00001% resolution (i.e., a fee can be 1%, 1.00001%, 1.00002%, but not 1.000005%).
* Disallow setting fees such that there would be precision loss in the Vault, leading to a discrepancy between
* the aggregate fee calculated here and that stored in the Vault.
*/
error FeePrecisionTooHigh();
/// @notice A given percentage is above the maximum (usually a value close to FixedPoint.ONE, or 1e18 wei).
error PercentageAboveMax();
/*******************************************************************************
Queries
*******************************************************************************/
/// @notice A user tried to execute a query operation when they were disabled.
error QueriesDisabled();
/// @notice An admin tried to re-enable queries, but they were disabled permanently.
error QueriesDisabledPermanently();
/*******************************************************************************
Recovery Mode
*******************************************************************************/
/**
* @notice Cannot enable recovery mode when already enabled.
* @param pool The pool
*/
error PoolInRecoveryMode(address pool);
/**
* @notice Cannot disable recovery mode when not enabled.
* @param pool The pool
*/
error PoolNotInRecoveryMode(address pool);
/*******************************************************************************
Authentication
*******************************************************************************/
/**
* @notice Error indicating the sender is not the Vault (e.g., someone is trying to call a permissioned function).
* @param sender The account attempting to call a permissioned function
*/
error SenderIsNotVault(address sender);
/*******************************************************************************
Pausing
*******************************************************************************/
/// @notice The caller specified a pause window period longer than the maximum.
error VaultPauseWindowDurationTooLarge();
/// @notice The caller specified a buffer period longer than the maximum.
error PauseBufferPeriodDurationTooLarge();
/// @notice A user tried to perform an operation while the Vault was paused.
error VaultPaused();
/// @notice Governance tried to unpause the Vault when it was not paused.
error VaultNotPaused();
/// @notice Governance tried to pause the Vault after the pause period expired.
error VaultPauseWindowExpired();
/**
* @notice A user tried to perform an operation involving a paused Pool.
* @param pool The paused pool
*/
error PoolPaused(address pool);
/**
* @notice Governance tried to unpause the Pool when it was not paused.
* @param pool The unpaused pool
*/
error PoolNotPaused(address pool);
/**
* @notice Governance tried to pause a Pool after the pause period expired.
* @param pool The pool
*/
error PoolPauseWindowExpired(address pool);
/*******************************************************************************
ERC4626 token buffers
*******************************************************************************/
/**
* @notice The buffer for the given wrapped token was already initialized.
* @param wrappedToken The wrapped token corresponding to the buffer
*/
error BufferAlreadyInitialized(IERC4626 wrappedToken);
/**
* @notice The buffer for the given wrapped token was not initialized.
* @param wrappedToken The wrapped token corresponding to the buffer
*/
error BufferNotInitialized(IERC4626 wrappedToken);
/// @notice The user is trying to remove more than their allocated shares from the buffer.
error NotEnoughBufferShares();
/**
* @notice The wrapped token asset does not match the underlying token.
* @dev This should never happen, but a malicious wrapper contract might not return the correct address.
* Legitimate wrapper contracts should make the asset a constant or immutable value.
*
* @param wrappedToken The wrapped token corresponding to the buffer
* @param underlyingToken The underlying token returned by `asset`
*/
error WrongUnderlyingToken(IERC4626 wrappedToken, address underlyingToken);
/**
* @notice A wrapped token reported the zero address as its underlying token asset.
* @dev This should never happen, but a malicious wrapper contract might do this (e.g., in an attempt to
* re-initialize the buffer).
*
* @param wrappedToken The wrapped token corresponding to the buffer
*/
error InvalidUnderlyingToken(IERC4626 wrappedToken);
/**
* @notice The amount given to wrap/unwrap was too small, which can introduce rounding issues.
* @param wrappedToken The wrapped token corresponding to the buffer
*/
error WrapAmountTooSmall(IERC4626 wrappedToken);
/// @notice Buffer operation attempted while vault buffers are paused.
error VaultBuffersArePaused();
/// @notice Buffer shares were minted to the zero address.
error BufferSharesInvalidReceiver();
/// @notice Buffer shares were burned from the zero address.
error BufferSharesInvalidOwner();
/**
* @notice The total supply of a buffer can't be lower than the absolute minimum.
* @param totalSupply The total supply value that was below the minimum
*/
error BufferTotalSupplyTooLow(uint256 totalSupply);
/// @dev A wrap/unwrap operation consumed more or returned less underlying tokens than it should.
error NotEnoughUnderlying(IERC4626 wrappedToken, uint256 expectedUnderlyingAmount, uint256 actualUnderlyingAmount);
/// @dev A wrap/unwrap operation consumed more or returned less wrapped tokens than it should.
error NotEnoughWrapped(IERC4626 wrappedToken, uint256 expectedWrappedAmount, uint256 actualWrappedAmount);
/// @dev Shares issued during initialization are below the requested amount.
error IssuedSharesBelowMin(uint256 issuedShares, uint256 minIssuedShares);
/*******************************************************************************
Miscellaneous
*******************************************************************************/
/// @notice Pool does not support adding / removing liquidity with an unbalanced input.
error DoesNotSupportUnbalancedLiquidity();
/// @notice The contract should not receive ETH.
error CannotReceiveEth();
/**
* @notice The `VaultExtension` contract was called by an account directly.
* @dev It can only be called by the Vault via delegatecall.
*/
error NotVaultDelegateCall();
/// @notice The `VaultExtension` contract was configured with an incorrect Vault address.
error WrongVaultExtensionDeployment();
/// @notice The `ProtocolFeeController` contract was configured with an incorrect Vault address.
error WrongProtocolFeeControllerDeployment();
/// @notice The `VaultAdmin` contract was configured with an incorrect Vault address.
error WrongVaultAdminDeployment();
/// @notice Quote reverted with a reserved error code.
error QuoteResultSpoofed();
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IProtocolFeeController } from "./IProtocolFeeController.sol";
import { IAuthorizer } from "./IAuthorizer.sol";
import { IHooks } from "./IHooks.sol";
import "./VaultTypes.sol";
/// @dev Events are declared inside an interface (namespace) to improve DX with Typechain.
interface IVaultEvents {
/**
* @notice A Pool was registered by calling `registerPool`.
* @param pool The pool being registered
* @param factory The factory creating the pool
* @param tokenConfig An array of descriptors for the tokens the pool will manage
* @param swapFeePercentage The static swap fee of the pool
* @param pauseWindowEndTime The pool's pause window end time
* @param roleAccounts Addresses the Vault will allow to change certain pool settings
* @param hooksConfig Flags indicating which hooks the pool supports and address of hooks contract
* @param liquidityManagement Supported liquidity management hook flags
*/
event PoolRegistered(
address indexed pool,
address indexed factory,
TokenConfig[] tokenConfig,
uint256 swapFeePercentage,
uint32 pauseWindowEndTime,
PoolRoleAccounts roleAccounts,
HooksConfig hooksConfig,
LiquidityManagement liquidityManagement
);
/**
* @notice A Pool was initialized by calling `initialize`.
* @param pool The pool being initialized
*/
event PoolInitialized(address indexed pool);
/**
* @notice A swap has occurred.
* @param pool The pool with the tokens being swapped
* @param tokenIn The token entering the Vault (balance increases)
* @param tokenOut The token leaving the Vault (balance decreases)
* @param amountIn Number of tokenIn tokens
* @param amountOut Number of tokenOut tokens
* @param swapFeePercentage Swap fee percentage applied (can differ if dynamic)
* @param swapFeeAmount Swap fee amount paid
*/
event Swap(
address indexed pool,
IERC20 indexed tokenIn,
IERC20 indexed tokenOut,
uint256 amountIn,
uint256 amountOut,
uint256 swapFeePercentage,
uint256 swapFeeAmount
);
/**
* @notice A wrap operation has occurred.
* @param wrappedToken The wrapped token address
* @param depositedUnderlying Number of underlying tokens deposited
* @param mintedShares Number of shares (wrapped tokens) minted
* @param bufferBalances The final buffer balances, packed in 128-bit words (underlying, wrapped)
*/
event Wrap(
IERC4626 indexed wrappedToken,
uint256 depositedUnderlying,
uint256 mintedShares,
bytes32 bufferBalances
);
/**
* @notice An unwrap operation has occurred.
* @param wrappedToken The wrapped token address
* @param burnedShares Number of shares (wrapped tokens) burned
* @param withdrawnUnderlying Number of underlying tokens withdrawn
* @param bufferBalances The final buffer balances, packed in 128-bit words (underlying, wrapped)
*/
event Unwrap(
IERC4626 indexed wrappedToken,
uint256 burnedShares,
uint256 withdrawnUnderlying,
bytes32 bufferBalances
);
/**
* @notice Liquidity has been added to a pool (including initialization).
* @param pool The pool with liquidity added
* @param liquidityProvider The user performing the operation
* @param kind The add liquidity operation type (e.g., proportional, custom)
* @param totalSupply The total supply of the pool after the operation
* @param amountsAddedRaw The amount of each token that was added, sorted in token registration order
* @param swapFeeAmountsRaw The total swap fees charged, sorted in token registration order
*/
event LiquidityAdded(
address indexed pool,
address indexed liquidityProvider,
AddLiquidityKind indexed kind,
uint256 totalSupply,
uint256[] amountsAddedRaw,
uint256[] swapFeeAmountsRaw
);
/**
* @notice Liquidity has been removed from a pool.
* @param pool The pool with liquidity removed
* @param liquidityProvider The user performing the operation
* @param kind The remove liquidity operation type (e.g., proportional, custom)
* @param totalSupply The total supply of the pool after the operation
* @param amountsRemovedRaw The amount of each token that was removed, sorted in token registration order
* @param swapFeeAmountsRaw The total swap fees charged, sorted in token registration order
*/
event LiquidityRemoved(
address indexed pool,
address indexed liquidityProvider,
RemoveLiquidityKind indexed kind,
uint256 totalSupply,
uint256[] amountsRemovedRaw,
uint256[] swapFeeAmountsRaw
);
/**
* @notice The Vault's pause status has changed.
* @param paused True if the Vault was paused
*/
event VaultPausedStateChanged(bool paused);
/// @notice `disableQuery` has been called on the Vault, disabling query functionality.
event VaultQueriesDisabled();
/// @notice `enableQuery` has been called on the Vault, enabling query functionality.
event VaultQueriesEnabled();
/**
* @notice A Pool's pause status has changed.
* @param pool The pool that was just paused or unpaused
* @param paused True if the pool was paused
*/
event PoolPausedStateChanged(address indexed pool, bool paused);
/**
* @notice Emitted when the swap fee percentage of a pool is updated.
* @param swapFeePercentage The new swap fee percentage for the pool
*/
event SwapFeePercentageChanged(address indexed pool, uint256 swapFeePercentage);
/**
* @notice Recovery mode has been enabled or disabled for a pool.
* @param pool The pool
* @param recoveryMode True if recovery mode was enabled
*/
event PoolRecoveryModeStateChanged(address indexed pool, bool recoveryMode);
/**
* @notice A protocol or pool creator fee has changed, causing an update to the aggregate swap fee.
* @dev The `ProtocolFeeController` will emit an event with the underlying change.
* @param pool The pool whose aggregate swap fee percentage changed
* @param aggregateSwapFeePercentage The new aggregate swap fee percentage
*/
event AggregateSwapFeePercentageChanged(address indexed pool, uint256 aggregateSwapFeePercentage);
/**
* @notice A protocol or pool creator fee has changed, causing an update to the aggregate yield fee.
* @dev The `ProtocolFeeController` will emit an event with the underlying change.
* @param pool The pool whose aggregate yield fee percentage changed
* @param aggregateYieldFeePercentage The new aggregate yield fee percentage
*/
event AggregateYieldFeePercentageChanged(address indexed pool, uint256 aggregateYieldFeePercentage);
/**
* @notice A new authorizer is set by `setAuthorizer`.
* @param newAuthorizer The address of the new authorizer
*/
event AuthorizerChanged(IAuthorizer indexed newAuthorizer);
/**
* @notice A new protocol fee controller is set by `setProtocolFeeController`.
* @param newProtocolFeeController The address of the new protocol fee controller
*/
event ProtocolFeeControllerChanged(IProtocolFeeController indexed newProtocolFeeController);
/**
* @notice Liquidity was added to an ERC4626 buffer corresponding to the given wrapped token.
* @dev The underlying token can be derived from the wrapped token, so it's not included here.
*
* @param wrappedToken The wrapped token that identifies the buffer
* @param amountUnderlying The amount of the underlying token that was deposited
* @param amountWrapped The amount of the wrapped token that was deposited
* @param bufferBalances The final buffer balances, packed in 128-bit words (underlying, wrapped)
*/
event LiquidityAddedToBuffer(
IERC4626 indexed wrappedToken,
uint256 amountUnderlying,
uint256 amountWrapped,
bytes32 bufferBalances
);
/**
* @notice Buffer shares were minted for an ERC4626 buffer corresponding to a given wrapped token.
* @dev The shares are not tokenized like pool BPT, but accounted for in the Vault. `getBufferOwnerShares`
* retrieves the current total shares for a given buffer and address, and `getBufferTotalShares` returns the
* "totalSupply" of a buffer.
*
* @param wrappedToken The wrapped token that identifies the buffer
* @param to The owner of the minted shares
* @param issuedShares The amount of "internal BPT" shares created
*/
event BufferSharesMinted(IERC4626 indexed wrappedToken, address indexed to, uint256 issuedShares);
/**
* @notice Buffer shares were burned for an ERC4626 buffer corresponding to a given wrapped token.
* @dev The shares are not tokenized like pool BPT, but accounted for in the Vault. `getBufferOwnerShares`
* retrieves the current total shares for a given buffer and address, and `getBufferTotalShares` returns the
* "totalSupply" of a buffer.
*
* @param wrappedToken The wrapped token that identifies the buffer
* @param from The owner of the burned shares
* @param burnedShares The amount of "internal BPT" shares burned
*/
event BufferSharesBurned(IERC4626 indexed wrappedToken, address indexed from, uint256 burnedShares);
/**
* @notice Liquidity was removed from an ERC4626 buffer.
* @dev The underlying token can be derived from the wrapped token, so it's not included here.
* @param wrappedToken The wrapped token that identifies the buffer
* @param amountUnderlying The amount of the underlying token that was withdrawn
* @param amountWrapped The amount of the wrapped token that was withdrawn
* @param bufferBalances The final buffer balances, packed in 128-bit words (underlying, wrapped)
*/
event LiquidityRemovedFromBuffer(
IERC4626 indexed wrappedToken,
uint256 amountUnderlying,
uint256 amountWrapped,
bytes32 bufferBalances
);
/**
* @notice The Vault buffers pause status has changed.
* @dev If buffers all paused, all buffer operations (i.e., all calls through the Router with `isBuffer`
* set to true) will revert.
*
* @param paused True if the Vault buffers were paused
*/
event VaultBuffersPausedStateChanged(bool paused);
/**
* @notice Pools can use this event to emit event data from the Vault.
* @param pool Pool address
* @param eventKey Event key
* @param eventData Encoded event data
*/
event VaultAuxiliary(address indexed pool, bytes32 indexed eventKey, bytes eventData);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IAuthorizer } from "./IAuthorizer.sol";
import { IProtocolFeeController } from "./IProtocolFeeController.sol";
import { IVault } from "./IVault.sol";
import { IHooks } from "./IHooks.sol";
import "./VaultTypes.sol";
/**
* @notice Interface for functions defined on the `VaultExtension` contract.
* @dev `VaultExtension` handles less critical or frequently used functions, since delegate calls through
* the Vault are more expensive than direct calls. The main Vault contains the core code for swaps and
* liquidity operations.
*/
interface IVaultExtension {
/*******************************************************************************
Constants and immutables
*******************************************************************************/
/**
* @notice Returns the main Vault address.
* @dev The main Vault contains the entrypoint and main liquidity operation implementations.
* @return vault The address of the main Vault
*/
function vault() external view returns (IVault);
/**
* @notice Returns the VaultAdmin contract address.
* @dev The VaultAdmin contract mostly implements permissioned functions.
* @return vaultAdmin The address of the Vault admin
*/
function getVaultAdmin() external view returns (address vaultAdmin);
/*******************************************************************************
Transient Accounting
*******************************************************************************/
/**
* @notice Returns whether the Vault is unlocked (i.e., executing an operation).
* @dev The Vault must be unlocked to perform state-changing liquidity operations.
* @return unlocked True if the Vault is unlocked, false otherwise
*/
function isUnlocked() external view returns (bool unlocked);
/**
* @notice Returns the count of non-zero deltas.
* @return nonzeroDeltaCount The current value of `_nonzeroDeltaCount`
*/
function getNonzeroDeltaCount() external view returns (uint256 nonzeroDeltaCount);
/**
* @notice Retrieves the token delta for a specific token.
* @dev This function allows reading the value from the `_tokenDeltas` mapping.
* @param token The token for which the delta is being fetched
* @return tokenDelta The delta of the specified token
*/
function getTokenDelta(IERC20 token) external view returns (int256 tokenDelta);
/**
* @notice Retrieves the reserve (i.e., total Vault balance) of a given token.
* @param token The token for which to retrieve the reserve
* @return reserveAmount The amount of reserves for the given token
*/
function getReservesOf(IERC20 token) external view returns (uint256 reserveAmount);
/**
* @notice This flag is used to detect and tax "round-trip" interactions (adding and removing liquidity in the
* same pool).
* @dev Taxing remove liquidity proportional whenever liquidity was added in the same `unlock` call adds an extra
* layer of security, discouraging operations that try to undo others for profit. Remove liquidity proportional
* is the only standard way to exit a position without fees, and this flag is used to enable fees in that case.
* It also discourages indirect swaps via unbalanced add and remove proportional, as they are expected to be worse
* than a simple swap for every pool type.
*
* @param pool Address of the pool to check
* @return liquidityAdded True if liquidity has been added to this pool in the current transaction
* Note that there is no `sessionId` argument; it always returns the value for the current (i.e., latest) session.
*/
function getAddLiquidityCalledFlag(address pool) external view returns (bool liquidityAdded);
/*******************************************************************************
Pool Registration
*******************************************************************************/
/**
* @notice Registers a pool, associating it with its factory and the tokens it manages.
* @dev A pool can opt-out of pausing by providing a zero value for the pause window, or allow pausing indefinitely
* by providing a large value. (Pool pause windows are not limited by the Vault maximums.) The vault defines an
* additional buffer period during which a paused pool will stay paused. After the buffer period passes, a paused
* pool will automatically unpause. Balancer timestamps are 32 bits.
*
* A pool can opt out of Balancer governance pausing by providing a custom `pauseManager`. This might be a
* multi-sig contract or an arbitrary smart contract with its own access controls, that forwards calls to
* the Vault.
*
* If the zero address is provided for the `pauseManager`, permissions for pausing the pool will default to the
* authorizer.
*
* @param pool The address of the pool being registered
* @param tokenConfig An array of descriptors for the tokens the pool will manage
* @param swapFeePercentage The initial static swap fee percentage of the pool
* @param pauseWindowEndTime The timestamp after which it is no longer possible to pause the pool
* @param protocolFeeExempt If true, the pool's initial aggregate fees will be set to 0
* @param roleAccounts Addresses the Vault will allow to change certain pool settings
* @param poolHooksContract Contract that implements the hooks for the pool
* @param liquidityManagement Liquidity management flags with implemented methods
*/
function registerPool(
address pool,
TokenConfig[] memory tokenConfig,
uint256 swapFeePercentage,
uint32 pauseWindowEndTime,
bool protocolFeeExempt,
PoolRoleAccounts calldata roleAccounts,
address poolHooksContract,
LiquidityManagement calldata liquidityManagement
) external;
/**
* @notice Checks whether a pool is registered.
* @param pool Address of the pool to check
* @return registered True if the pool is registered, false otherwise
*/
function isPoolRegistered(address pool) external view returns (bool registered);
/**
* @notice Initializes a registered pool by adding liquidity; mints BPT tokens for the first time in exchange.
* @param pool Address of the pool to initialize
* @param to Address that will receive the output BPT
* @param tokens Tokens used to seed the pool (must match the registered tokens)
* @param exactAmountsIn Exact amounts of input tokens
* @param minBptAmountOut Minimum amount of output pool tokens
* @param userData Additional (optional) data required for adding initial liquidity
* @return bptAmountOut Output pool token amount
*/
function initialize(
address pool,
address to,
IERC20[] memory tokens,
uint256[] memory exactAmountsIn,
uint256 minBptAmountOut,
bytes memory userData
) external returns (uint256 bptAmountOut);
/*******************************************************************************
Pool Information
*******************************************************************************/
/**
* @notice Checks whether a pool is initialized.
* @dev An initialized pool can be considered registered as well.
* @param pool Address of the pool to check
* @return initialized True if the pool is initialized, false otherwise
*/
function isPoolInitialized(address pool) external view returns (bool initialized);
/**
* @notice Gets the tokens registered to a pool.
* @param pool Address of the pool
* @return tokens List of tokens in the pool
*/
function getPoolTokens(address pool) external view returns (IERC20[] memory tokens);
/**
* @notice Gets pool token rates.
* @dev This function performs external calls if tokens are yield-bearing. All returned arrays are in token
* registration order.
*
* @param pool Address of the pool
* @return decimalScalingFactors Conversion factor used to adjust for token decimals for uniform precision in
* calculations. FP(1) for 18-decimal tokens
* @return tokenRates 18-decimal FP values for rate tokens (e.g., yield-bearing), or FP(1) for standard tokens
*/
function getPoolTokenRates(
address pool
) external view returns (uint256[] memory decimalScalingFactors, uint256[] memory tokenRates);
/**
* @notice Returns comprehensive pool data for the given pool.
* @dev This contains the pool configuration (flags), tokens and token types, rates, scaling factors, and balances.
* @param pool The address of the pool
* @return poolData The `PoolData` result
*/
function getPoolData(address pool) external view returns (PoolData memory poolData);
/**
* @notice Gets the raw data for a pool: tokens, raw balances, scaling factors.
* @param pool Address of the pool
* @return tokens The pool tokens, sorted in registration order
* @return tokenInfo Token info structs (type, rate provider, yield flag), sorted in token registration order
* @return balancesRaw Current native decimal balances of the pool tokens, sorted in token registration order
* @return lastBalancesLiveScaled18 Last saved live balances, sorted in token registration order
*/
function getPoolTokenInfo(
address pool
)
external
view
returns (
IERC20[] memory tokens,
TokenInfo[] memory tokenInfo,
uint256[] memory balancesRaw,
uint256[] memory lastBalancesLiveScaled18
);
/**
* @notice Gets current live balances of a given pool (fixed-point, 18 decimals), corresponding to its tokens in
* registration order.
*
* @param pool Address of the pool
* @return balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
*/
function getCurrentLiveBalances(address pool) external view returns (uint256[] memory balancesLiveScaled18);
/**
* @notice Gets the configuration parameters of a pool.
* @dev The `PoolConfig` contains liquidity management and other state flags, fee percentages, the pause window.
* @param pool Address of the pool
* @return poolConfig The pool configuration as a `PoolConfig` struct
*/
function getPoolConfig(address pool) external view returns (PoolConfig memory poolConfig);
/**
* @notice Gets the hooks configuration parameters of a pool.
* @dev The `HooksConfig` contains flags indicating which pool hooks are implemented.
* @param pool Address of the pool
* @return hooksConfig The hooks configuration as a `HooksConfig` struct
*/
function getHooksConfig(address pool) external view returns (HooksConfig memory hooksConfig);
/**
* @notice The current rate of a pool token (BPT) = invariant / totalSupply.
* @param pool Address of the pool
* @return rate BPT rate
*/
function getBptRate(address pool) external view returns (uint256 rate);
/*******************************************************************************
Balancer Pool Tokens
*******************************************************************************/
/**
* @notice Gets the total supply of a given ERC20 token.
* @param token The token address
* @return tokenTotalSupply Total supply of the token
*/
function totalSupply(address token) external view returns (uint256 tokenTotalSupply);
/**
* @notice Gets the balance of an account for a given ERC20 token.
* @param token Address of the token
* @param account Address of the account
* @return tokenBalance Token balance of the account
*/
function balanceOf(address token, address account) external view returns (uint256 tokenBalance);
/**
* @notice Gets the allowance of a spender for a given ERC20 token and owner.
* @param token Address of the token
* @param owner Address of the owner
* @param spender Address of the spender
* @return tokenAllowance Amount of tokens the spender is allowed to spend
*/
function allowance(address token, address owner, address spender) external view returns (uint256 tokenAllowance);
/**
* @notice Approves a spender to spend pool tokens on behalf of sender.
* @dev Notice that the pool token address is not included in the params. This function is exclusively called by
* the pool contract, so msg.sender is used as the token address.
*
* @param owner Address of the owner
* @param spender Address of the spender
* @param amount Amount of tokens to approve
* @return success True if successful, false otherwise
*/
function approve(address owner, address spender, uint256 amount) external returns (bool success);
/*******************************************************************************
Pool Pausing
*******************************************************************************/
/**
* @notice Indicates whether a pool is paused.
* @dev If a pool is paused, all non-Recovery Mode state-changing operations will revert.
* @param pool The pool to be checked
* @return poolPaused True if the pool is paused
*/
function isPoolPaused(address pool) external view returns (bool poolPaused);
/**
* @notice Returns the paused status, and end times of the Pool's pause window and buffer period.
* @dev Note that even when set to a paused state, the pool will automatically unpause at the end of
* the buffer period. Balancer timestamps are 32 bits.
*
* @param pool The pool whose data is requested
* @return poolPaused True if the Pool is paused
* @return poolPauseWindowEndTime The timestamp of the end of the Pool's pause window
* @return poolBufferPeriodEndTime The timestamp after which the Pool unpauses itself (if paused)
* @return pauseManager The pause manager, or the zero address
*/
function getPoolPausedState(
address pool
)
external
view
returns (bool poolPaused, uint32 poolPauseWindowEndTime, uint32 poolBufferPeriodEndTime, address pauseManager);
/*******************************************************************************
ERC4626 Buffers
*******************************************************************************/
/**
* @notice Checks if the wrapped token has an initialized buffer in the Vault.
* @dev An initialized buffer should have an asset registered in the Vault.
* @param wrappedToken Address of the wrapped token that implements IERC4626
* @return isBufferInitialized True if the ERC4626 buffer is initialized
*/
function isERC4626BufferInitialized(IERC4626 wrappedToken) external view returns (bool isBufferInitialized);
/**
* @notice Gets the registered asset for a given buffer.
* @dev To avoid malicious wrappers (e.g., that might potentially change their asset after deployment), routers
* should never call `wrapper.asset()` directly, at least without checking it against the asset registered with
* the Vault on initialization.
*
* @param wrappedToken The wrapped token specifying the buffer
* @return asset The underlying asset of the wrapped token
*/
function getERC4626BufferAsset(IERC4626 wrappedToken) external view returns (address asset);
/*******************************************************************************
Fees
*******************************************************************************/
/**
* @notice Returns the accumulated swap fees (including aggregate fees) in `token` collected by the pool.
* @param pool The address of the pool for which aggregate fees have been collected
* @param token The address of the token in which fees have been accumulated
* @return swapFeeAmount The total amount of fees accumulated in the specified token
*/
function getAggregateSwapFeeAmount(address pool, IERC20 token) external view returns (uint256 swapFeeAmount);
/**
* @notice Returns the accumulated yield fees (including aggregate fees) in `token` collected by the pool.
* @param pool The address of the pool for which aggregate fees have been collected
* @param token The address of the token in which fees have been accumulated
* @return yieldFeeAmount The total amount of fees accumulated in the specified token
*/
function getAggregateYieldFeeAmount(address pool, IERC20 token) external view returns (uint256 yieldFeeAmount);
/**
* @notice Fetches the static swap fee percentage for a given pool.
* @param pool The address of the pool whose static swap fee percentage is being queried
* @return swapFeePercentage The current static swap fee percentage for the specified pool
*/
function getStaticSwapFeePercentage(address pool) external view returns (uint256 swapFeePercentage);
/**
* @notice Fetches the role accounts for a given pool (pause manager, swap manager, pool creator)
* @param pool The address of the pool whose roles are being queried
* @return roleAccounts A struct containing the role accounts for the pool (or 0 if unassigned)
*/
function getPoolRoleAccounts(address pool) external view returns (PoolRoleAccounts memory roleAccounts);
/**
* @notice Query the current dynamic swap fee percentage of a pool, given a set of swap parameters.
* @dev Reverts if the hook doesn't return the success flag set to `true`.
* @param pool The pool
* @param swapParams The swap parameters used to compute the fee
* @return dynamicSwapFeePercentage The dynamic swap fee percentage
*/
function computeDynamicSwapFeePercentage(
address pool,
PoolSwapParams memory swapParams
) external view returns (uint256 dynamicSwapFeePercentage);
/**
* @notice Returns the Protocol Fee Controller address.
* @return protocolFeeController Address of the ProtocolFeeController
*/
function getProtocolFeeController() external view returns (IProtocolFeeController protocolFeeController);
/*******************************************************************************
Recovery Mode
*******************************************************************************/
/**
* @notice Checks whether a pool is in Recovery Mode.
* @dev Recovery Mode enables a safe proportional withdrawal path, with no external calls.
* @param pool Address of the pool to check
* @return inRecoveryMode True if the pool is in Recovery Mode, false otherwise
*/
function isPoolInRecoveryMode(address pool) external view returns (bool inRecoveryMode);
/**
* @notice Remove liquidity from a pool specifying exact pool tokens in, with proportional token amounts out.
* The request is implemented by the Vault without any interaction with the pool, ensuring that
* it works the same for all pools, and cannot be disabled by a new pool type.
*
* @param pool Address of the pool
* @param from Address of user to burn pool tokens from
* @param exactBptAmountIn Input pool token amount
* @param minAmountsOut Minimum amounts of tokens to be received, sorted in token registration order
* @return amountsOut Actual calculated amounts of output tokens, sorted in token registration order
*/
function removeLiquidityRecovery(
address pool,
address from,
uint256 exactBptAmountIn,
uint256[] memory minAmountsOut
) external returns (uint256[] memory amountsOut);
/*******************************************************************************
Queries
*******************************************************************************/
/**
* @notice Performs a callback on msg.sender with arguments provided in `data`.
* @dev Used to query a set of operations on the Vault. Only off-chain eth_call are allowed,
* anything else will revert.
*
* Allows querying any operation on the Vault that has the `onlyWhenUnlocked` modifier.
*
* Allows the external calling of a function via the Vault contract to
* access Vault's functions guarded by `onlyWhenUnlocked`.
* `transient` modifier ensuring balances changes within the Vault are settled.
*
* @param data Contains function signature and args to be passed to the msg.sender
* @return result Resulting data from the call
*/
function quote(bytes calldata data) external returns (bytes memory result);
/**
* @notice Performs a callback on msg.sender with arguments provided in `data`.
* @dev Used to query a set of operations on the Vault. Only off-chain eth_call are allowed,
* anything else will revert.
*
* Allows querying any operation on the Vault that has the `onlyWhenUnlocked` modifier.
*
* Allows the external calling of a function via the Vault contract to
* access Vault's functions guarded by `onlyWhenUnlocked`.
* `transient` modifier ensuring balances changes within the Vault are settled.
*
* This call always reverts, returning the result in the revert reason.
*
* @param data Contains function signature and args to be passed to the msg.sender
*/
function quoteAndRevert(bytes calldata data) external;
/**
* @notice Returns true if queries are disabled on the Vault.
* @dev If true, queries might either be disabled temporarily or permanently.
* @return queryDisabled True if query functionality is reversibly disabled
*/
function isQueryDisabled() external view returns (bool queryDisabled);
/**
* @notice Returns true if queries are disabled permanently; false if they are enabled.
* @dev This is a one-way switch. Once queries are disabled permanently, they can never be re-enabled.
* @return queryDisabledPermanently True if query functionality is permanently disabled
*/
function isQueryDisabledPermanently() external view returns (bool queryDisabledPermanently);
/**
* @notice Pools can use this event to emit event data from the Vault.
* @param eventKey Event key
* @param eventData Encoded event data
*/
function emitAuxiliaryEvent(bytes32 eventKey, bytes calldata eventData) external;
/*******************************************************************************
Authentication
*******************************************************************************/
/**
* @notice Returns the Authorizer address.
* @dev The authorizer holds the permissions granted by governance. It is set on Vault deployment,
* and can be changed through a permissioned call.
*
* @return authorizer Address of the authorizer contract
*/
function getAuthorizer() external view returns (IAuthorizer authorizer);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import "./VaultTypes.sol";
/**
* @notice Interface for functions defined on the main Vault contract.
* @dev These are generally "critical path" functions (swap, add/remove liquidity) that are in the main contract
* for technical or performance reasons.
*/
interface IVaultMain {
/*******************************************************************************
Transient Accounting
*******************************************************************************/
/**
* @notice Creates a context for a sequence of operations (i.e., "unlocks" the Vault).
* @dev Performs a callback on msg.sender with arguments provided in `data`. The Callback is `transient`,
* meaning all balances for the caller have to be settled at the end.
*
* @param data Contains function signature and args to be passed to the msg.sender
* @return result Resulting data from the call
*/
function unlock(bytes calldata data) external returns (bytes memory result);
/**
* @notice Settles deltas for a token; must be successful for the current lock to be released.
* @dev Protects the caller against leftover dust in the Vault for the token being settled. The caller
* should know in advance how many tokens were paid to the Vault, so it can provide it as a hint to discard any
* excess in the Vault balance.
*
* If the given hint is equal to or higher than the difference in reserves, the difference in reserves is given as
* credit to the caller. If it's higher, the caller sent fewer tokens than expected, so settlement would fail.
*
* If the given hint is lower than the difference in reserves, the hint is given as credit to the caller.
* In this case, the excess would be absorbed by the Vault (and reflected correctly in the reserves), but would
* not affect settlement.
*
* The credit supplied by the Vault can be calculated as `min(reserveDifference, amountHint)`, where the reserve
* difference equals current balance of the token minus existing reserves of the token when the function is called.
*
* @param token Address of the token
* @param amountHint Amount paid as reported by the caller
* @return credit Credit received in return of the payment
*/
function settle(IERC20 token, uint256 amountHint) external returns (uint256 credit);
/**
* @notice Sends tokens to a recipient.
* @dev There is no inverse operation for this function. Transfer funds to the Vault and call `settle` to cancel
* debts.
*
* @param token Address of the token
* @param to Recipient address
* @param amount Amount of tokens to send
*/
function sendTo(IERC20 token, address to, uint256 amount) external;
/***************************************************************************
Swaps
***************************************************************************/
/**
* @notice Swaps tokens based on provided parameters.
* @dev All parameters are given in raw token decimal encoding.
* @param vaultSwapParams Parameters for the swap (see above for struct definition)
* @return amountCalculatedRaw Calculated swap amount
* @return amountInRaw Amount of input tokens for the swap
* @return amountOutRaw Amount of output tokens from the swap
*/
function swap(
VaultSwapParams memory vaultSwapParams
) external returns (uint256 amountCalculatedRaw, uint256 amountInRaw, uint256 amountOutRaw);
/***************************************************************************
Add Liquidity
***************************************************************************/
/**
* @notice Adds liquidity to a pool.
* @dev Caution should be exercised when adding liquidity because the Vault has the capability
* to transfer tokens from any user, given that it holds all allowances.
*
* @param params Parameters for the add liquidity (see above for struct definition)
* @return amountsIn Actual amounts of input tokens
* @return bptAmountOut Output pool token amount
* @return returnData Arbitrary (optional) data with an encoded response from the pool
*/
function addLiquidity(
AddLiquidityParams memory params
) external returns (uint256[] memory amountsIn, uint256 bptAmountOut, bytes memory returnData);
/***************************************************************************
Remove Liquidity
***************************************************************************/
/**
* @notice Removes liquidity from a pool.
* @dev Trusted routers can burn pool tokens belonging to any user and require no prior approval from the user.
* Untrusted routers require prior approval from the user. This is the only function allowed to call
* _queryModeBalanceIncrease (and only in a query context).
*
* @param params Parameters for the remove liquidity (see above for struct definition)
* @return bptAmountIn Actual amount of BPT burned
* @return amountsOut Actual amounts of output tokens
* @return returnData Arbitrary (optional) data with an encoded response from the pool
*/
function removeLiquidity(
RemoveLiquidityParams memory params
) external returns (uint256 bptAmountIn, uint256[] memory amountsOut, bytes memory returnData);
/*******************************************************************************
Pool Information
*******************************************************************************/
/**
* @notice Gets the index of a token in a given pool.
* @dev Reverts if the pool is not registered, or if the token does not belong to the pool.
* @param pool Address of the pool
* @param token Address of the token
* @return tokenCount Number of tokens in the pool
* @return index Index corresponding to the given token in the pool's token list
*/
function getPoolTokenCountAndIndexOfToken(
address pool,
IERC20 token
) external view returns (uint256 tokenCount, uint256 index);
/*******************************************************************************
Balancer Pool Tokens
*******************************************************************************/
/**
* @notice Transfers pool token from owner to a recipient.
* @dev Notice that the pool token address is not included in the params. This function is exclusively called by
* the pool contract, so msg.sender is used as the token address.
*
* @param owner Address of the owner
* @param to Address of the recipient
* @param amount Amount of tokens to transfer
* @return success True if successful, false otherwise
*/
function transfer(address owner, address to, uint256 amount) external returns (bool);
/**
* @notice Transfers pool token from a sender to a recipient using an allowance.
* @dev Notice that the pool token address is not included in the params. This function is exclusively called by
* the pool contract, so msg.sender is used as the token address.
*
* @param spender Address allowed to perform the transfer
* @param from Address of the sender
* @param to Address of the recipient
* @param amount Amount of tokens to transfer
* @return success True if successful, false otherwise
*/
function transferFrom(address spender, address from, address to, uint256 amount) external returns (bool success);
/*******************************************************************************
ERC4626 Buffers
*******************************************************************************/
/**
* @notice Wraps/unwraps tokens based on the parameters provided.
* @dev All parameters are given in raw token decimal encoding. It requires the buffer to be initialized,
* and uses the internal wrapped token buffer when it has enough liquidity to avoid external calls.
*
* @param params Parameters for the wrap/unwrap operation (see struct definition)
* @return amountCalculatedRaw Calculated swap amount
* @return amountInRaw Amount of input tokens for the swap
* @return amountOutRaw Amount of output tokens from the swap
*/
function erc4626BufferWrapOrUnwrap(
BufferWrapOrUnwrapParams memory params
) external returns (uint256 amountCalculatedRaw, uint256 amountInRaw, uint256 amountOutRaw);
/*******************************************************************************
Miscellaneous
*******************************************************************************/
/**
* @notice Returns the VaultExtension contract address.
* @dev Function is in the main Vault contract. The VaultExtension handles less critical or frequently used
* functions, since delegate calls through the Vault are more expensive than direct calls.
*
* @return vaultExtension Address of the VaultExtension
*/
function getVaultExtension() external view returns (address vaultExtension);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { IERC4626 } from "@openzeppelin/contracts/interfaces/IERC4626.sol";
import { IRateProvider } from "../solidity-utils/helpers/IRateProvider.sol";
/**
* @notice Represents a pool's liquidity management configuration.
* @param disableUnbalancedLiquidity If set, liquidity can only be added or removed proportionally
* @param enableAddLiquidityCustom If set, the pool has implemented `onAddLiquidityCustom`
* @param enableRemoveLiquidityCustom If set, the pool has implemented `onRemoveLiquidityCustom`
* @param enableDonation If set, the pool will not revert if liquidity is added with AddLiquidityKind.DONATION
*/
struct LiquidityManagement {
bool disableUnbalancedLiquidity;
bool enableAddLiquidityCustom;
bool enableRemoveLiquidityCustom;
bool enableDonation;
}
// @notice Custom type to store the entire configuration of the pool.
type PoolConfigBits is bytes32;
/**
* @notice Represents a pool's configuration (hooks configuration are separated in another struct).
* @param liquidityManagement Flags related to adding/removing liquidity
* @param staticSwapFeePercentage The pool's native swap fee
* @param aggregateSwapFeePercentage The total swap fee charged, including protocol and pool creator components
* @param aggregateYieldFeePercentage The total swap fee charged, including protocol and pool creator components
* @param tokenDecimalDiffs Compressed storage of the token decimals of each pool token
* @param pauseWindowEndTime Timestamp after which the pool cannot be paused
* @param isPoolRegistered If true, the pool has been registered with the Vault
* @param isPoolInitialized If true, the pool has been initialized with liquidity, and is available for trading
* @param isPoolPaused If true, the pool has been paused (by governance or the pauseManager)
* @param isPoolInRecoveryMode If true, the pool has been placed in recovery mode, enabling recovery mode withdrawals
*/
struct PoolConfig {
LiquidityManagement liquidityManagement;
uint256 staticSwapFeePercentage;
uint256 aggregateSwapFeePercentage;
uint256 aggregateYieldFeePercentage;
uint40 tokenDecimalDiffs;
uint32 pauseWindowEndTime;
bool isPoolRegistered;
bool isPoolInitialized;
bool isPoolPaused;
bool isPoolInRecoveryMode;
}
/**
* @notice The flag portion of the `HooksConfig`.
* @dev `enableHookAdjustedAmounts` must be true for all contracts that modify the `amountCalculated`
* in after hooks. Otherwise, the Vault will ignore any "hookAdjusted" amounts. Setting any "shouldCall"
* flags to true will cause the Vault to call the corresponding hook during operations.
*/
struct HookFlags {
bool enableHookAdjustedAmounts;
bool shouldCallBeforeInitialize;
bool shouldCallAfterInitialize;
bool shouldCallComputeDynamicSwapFee;
bool shouldCallBeforeSwap;
bool shouldCallAfterSwap;
bool shouldCallBeforeAddLiquidity;
bool shouldCallAfterAddLiquidity;
bool shouldCallBeforeRemoveLiquidity;
bool shouldCallAfterRemoveLiquidity;
}
/// @notice Represents a hook contract configuration for a pool (HookFlags + hooksContract address).
struct HooksConfig {
bool enableHookAdjustedAmounts;
bool shouldCallBeforeInitialize;
bool shouldCallAfterInitialize;
bool shouldCallComputeDynamicSwapFee;
bool shouldCallBeforeSwap;
bool shouldCallAfterSwap;
bool shouldCallBeforeAddLiquidity;
bool shouldCallAfterAddLiquidity;
bool shouldCallBeforeRemoveLiquidity;
bool shouldCallAfterRemoveLiquidity;
address hooksContract;
}
/**
* @notice Represents temporary state used during a swap operation.
* @param indexIn The zero-based index of tokenIn
* @param indexOut The zero-based index of tokenOut
* @param amountGivenScaled18 The amountGiven (i.e., tokenIn for ExactIn), adjusted for token decimals
* @param swapFeePercentage The swap fee to be applied (might be static or dynamic)
*/
struct SwapState {
uint256 indexIn;
uint256 indexOut;
uint256 amountGivenScaled18;
uint256 swapFeePercentage;
}
/**
* @notice Represents the Vault's configuration.
* @param isQueryDisabled If set to true, disables query functionality of the Vault. Can be modified by governance
* @param isVaultPaused If set to true, swaps and add/remove liquidity operations are halted
* @param areBuffersPaused If set to true, the Vault wrap/unwrap primitives associated with buffers will be disabled
*/
struct VaultState {
bool isQueryDisabled;
bool isVaultPaused;
bool areBuffersPaused;
}
/**
* @notice Represents the accounts holding certain roles for a given pool. This is passed in on pool registration.
* @param pauseManager Account empowered to pause/unpause the pool (note that governance can always pause a pool)
* @param swapFeeManager Account empowered to set static swap fees for a pool (or 0 to delegate to governance)
* @param poolCreator Account empowered to set the pool creator fee (or 0 if all fees go to the protocol and LPs)
*/
struct PoolRoleAccounts {
address pauseManager;
address swapFeeManager;
address poolCreator;
}
/*******************************************************************************
Tokens
*******************************************************************************/
// Note that the following tokens are unsupported by the Vault. This list is not meant to be exhaustive, but covers
// many common types of tokens that will not work with the Vault architecture. (See https://github.com/d-xo/weird-erc20
// for examples of token features that are problematic for many protocols.)
//
// * Rebasing tokens (e.g., aDAI). The Vault keeps track of token balances in its internal accounting; any token whose
// balance changes asynchronously (i.e., outside a swap or liquidity operation), would get out-of-sync with this
// internal accounting. This category would also include "airdrop" tokens, whose balances can change unexpectedly.
//
// * Double entrypoint (e.g., old Synthetix tokens, now fixed). These could likewise bypass internal accounting by
// registering the token under one address, then accessing it through another. This is especially troublesome
// in v3, with the introduction of ERC4626 buffers.
//
// * Fee on transfer (e.g., PAXG). The Vault issues credits and debits according to given and calculated token amounts,
// and settlement assumes that the send/receive transfer functions transfer exactly the given number of tokens.
// If this is not the case, transactions will not settle. Unlike with the other types, which are fundamentally
// incompatible, it would be possible to design a Router to handle this - but we didn't try it. In any case, it's
// not supported in the current Routers.
//
// * Tokens with more than 18 decimals (e.g., YAM-V2). The Vault handles token scaling: i.e., handling I/O for
// amounts in native token decimals, but doing calculations with full 18-decimal precision. This requires reading
// and storing the decimals for each token. Since virtually all tokens are 18 or fewer decimals, and we have limited
// storage space, 18 was a reasonable maximum. Unlike the other types, this is enforceable by the Vault. Attempting
// to register such tokens will revert with `InvalidTokenDecimals`. Of course, we must also be able to read the token
// decimals, so the Vault only supports tokens that implement `IERC20Metadata.decimals`, and return a value less than
// or equal to 18.
//
// * Token decimals are checked and stored only once, on registration. Valid tokens store their decimals as immutable
// variables or constants. Malicious tokens that don't respect this basic property would not work anywhere in DeFi.
//
// These types of tokens are supported but discouraged, as they don't tend to play well with AMMs generally.
//
// * Very low-decimal tokens (e.g., GUSD). The Vault has been extensively tested with 6-decimal tokens (e.g., USDC),
// but going much below that may lead to unanticipated effects due to precision loss, especially with smaller trade
// values.
//
// * Revert on zero value approval/transfer. The Vault has been tested against these, but peripheral contracts, such
// as hooks, might not have been designed with this in mind.
//
// * Other types from "weird-erc20," such as upgradeable, pausable, or tokens with blocklists. We have seen cases
// where a token upgrade fails, "bricking" the token - and many operations on pools containing that token. Any
// sort of "permissioned" token that can make transfers fail can cause operations on pools containing them to
// revert. Even Recovery Mode cannot help then, as it does a proportional withdrawal of all tokens. If one of
// them is bricked, the whole operation will revert. Since v3 does not have "internal balances" like v2, there
// is no recourse.
//
// Of course, many tokens in common use have some of these "features" (especially centralized stable coins), so
// we have to support them anyway. Working with common centralized tokens is a risk common to all of DeFi.
/**
* @notice Token types supported by the Vault.
* @dev In general, pools may contain any combination of these tokens.
*
* STANDARD tokens (e.g., BAL, WETH) have no rate provider.
* WITH_RATE tokens (e.g., wstETH) require a rate provider. These may be tokens like wstETH, which need to be wrapped
* because the underlying stETH token is rebasing, and such tokens are unsupported by the Vault. They may also be
* tokens like sEUR, which track an underlying asset, but are not yield-bearing. Finally, this encompasses
* yield-bearing ERC4626 tokens, which can be used to facilitate swaps without requiring wrapping or unwrapping
* in most cases. The `paysYieldFees` flag can be used to indicate whether a token is yield-bearing (e.g., waDAI),
* not yield-bearing (e.g., sEUR), or yield-bearing but exempt from fees (e.g., in certain nested pools, where
* yield fees are charged elsewhere).
*
* NB: STANDARD must always be the first enum element, so that newly initialized data structures default to Standard.
*/
enum TokenType {
STANDARD,
WITH_RATE
}
/**
* @notice Encapsulate the data required for the Vault to support a token of the given type.
* @dev For STANDARD tokens, the rate provider address must be 0, and paysYieldFees must be false. All WITH_RATE tokens
* need a rate provider, and may or may not be yield-bearing.
*
* At registration time, it is useful to include the token address along with the token parameters in the structure
* passed to `registerPool`, as the alternative would be parallel arrays, which would be error prone and require
* validation checks. `TokenConfig` is only used for registration, and is never put into storage (see `TokenInfo`).
*
* @param token The token address
* @param tokenType The token type (see the enum for supported types)
* @param rateProvider The rate provider for a token (see further documentation above)
* @param paysYieldFees Flag indicating whether yield fees should be charged on this token
*/
struct TokenConfig {
IERC20 token;
TokenType tokenType;
IRateProvider rateProvider;
bool paysYieldFees;
}
/**
* @notice This data structure is stored in `_poolTokenInfo`, a nested mapping from pool -> (token -> TokenInfo).
* @dev Since the token is already the key of the nested mapping, it would be redundant (and an extra SLOAD) to store
* it again in the struct. When we construct PoolData, the tokens are separated into their own array.
*
* @param tokenType The token type (see the enum for supported types)
* @param rateProvider The rate provider for a token (see further documentation above)
* @param paysYieldFees Flag indicating whether yield fees should be charged on this token
*/
struct TokenInfo {
TokenType tokenType;
IRateProvider rateProvider;
bool paysYieldFees;
}
/**
* @notice Data structure used to represent the current pool state in memory
* @param poolConfigBits Custom type to store the entire configuration of the pool.
* @param tokens Pool tokens, sorted in token registration order
* @param tokenInfo Configuration data for each token, sorted in token registration order
* @param balancesRaw Token balances in native decimals
* @param balancesLiveScaled18 Token balances after paying yield fees, applying decimal scaling and rates
* @param tokenRates 18-decimal FP values for rate tokens (e.g., yield-bearing), or FP(1) for standard tokens
* @param decimalScalingFactors Conversion factor used to adjust for token decimals for uniform precision in
* calculations. It is 1e18 (FP 1) for 18-decimal tokens
*/
struct PoolData {
PoolConfigBits poolConfigBits;
IERC20[] tokens;
TokenInfo[] tokenInfo;
uint256[] balancesRaw;
uint256[] balancesLiveScaled18;
uint256[] tokenRates;
uint256[] decimalScalingFactors;
}
enum Rounding {
ROUND_UP,
ROUND_DOWN
}
/*******************************************************************************
Swaps
*******************************************************************************/
enum SwapKind {
EXACT_IN,
EXACT_OUT
}
// There are two "SwapParams" structs defined below. `VaultSwapParams` corresponds to the external swap API defined
// in the Router contracts, which uses explicit token addresses, the amount given and limit on the calculated amount
// expressed in native token decimals, and optional user data passed in from the caller.
//
// `PoolSwapParams` passes some of this information through (kind, userData), but "translates" the parameters to fit
// the internal swap API used by `IBasePool`. It scales amounts to full 18-decimal precision, adds the token balances,
// converts the raw token addresses to indices, and adds the address of the Router originating the request. It does
// not need the limit, since this is checked at the Router level.
/**
* @notice Data passed into primary Vault `swap` operations.
* @param kind Type of swap (Exact In or Exact Out)
* @param pool The pool with the tokens being swapped
* @param tokenIn The token entering the Vault (balance increases)
* @param tokenOut The token leaving the Vault (balance decreases)
* @param amountGivenRaw Amount specified for tokenIn or tokenOut (depending on the type of swap)
* @param limitRaw Minimum or maximum value of the calculated amount (depending on the type of swap)
* @param userData Additional (optional) user data
*/
struct VaultSwapParams {
SwapKind kind;
address pool;
IERC20 tokenIn;
IERC20 tokenOut;
uint256 amountGivenRaw;
uint256 limitRaw;
bytes userData;
}
/**
* @notice Data for a swap operation, used by contracts implementing `IBasePool`.
* @param kind Type of swap (exact in or exact out)
* @param amountGivenScaled18 Amount given based on kind of the swap (e.g., tokenIn for EXACT_IN)
* @param balancesScaled18 Current pool balances
* @param indexIn Index of tokenIn
* @param indexOut Index of tokenOut
* @param router The address (usually a router contract) that initiated a swap operation on the Vault
* @param userData Additional (optional) data required for the swap
*/
struct PoolSwapParams {
SwapKind kind;
uint256 amountGivenScaled18;
uint256[] balancesScaled18;
uint256 indexIn;
uint256 indexOut;
address router;
bytes userData;
}
/**
* @notice Data for the hook after a swap operation.
* @param kind Type of swap (exact in or exact out)
* @param tokenIn Token to be swapped from
* @param tokenOut Token to be swapped to
* @param amountInScaled18 Amount of tokenIn (entering the Vault)
* @param amountOutScaled18 Amount of tokenOut (leaving the Vault)
* @param tokenInBalanceScaled18 Updated (after swap) balance of tokenIn
* @param tokenOutBalanceScaled18 Updated (after swap) balance of tokenOut
* @param amountCalculatedScaled18 Token amount calculated by the swap
* @param amountCalculatedRaw Token amount calculated by the swap
* @param router The address (usually a router contract) that initiated a swap operation on the Vault
* @param pool Pool address
* @param userData Additional (optional) data required for the swap
*/
struct AfterSwapParams {
SwapKind kind;
IERC20 tokenIn;
IERC20 tokenOut;
uint256 amountInScaled18;
uint256 amountOutScaled18;
uint256 tokenInBalanceScaled18;
uint256 tokenOutBalanceScaled18;
uint256 amountCalculatedScaled18;
uint256 amountCalculatedRaw;
address router;
address pool;
bytes userData;
}
/*******************************************************************************
Add liquidity
*******************************************************************************/
enum AddLiquidityKind {
PROPORTIONAL,
UNBALANCED,
SINGLE_TOKEN_EXACT_OUT,
DONATION,
CUSTOM
}
/**
* @notice Data for an add liquidity operation.
* @param pool Address of the pool
* @param to Address of user to mint to
* @param maxAmountsIn Maximum amounts of input tokens
* @param minBptAmountOut Minimum amount of output pool tokens
* @param kind Add liquidity kind
* @param userData Optional user data
*/
struct AddLiquidityParams {
address pool;
address to;
uint256[] maxAmountsIn;
uint256 minBptAmountOut;
AddLiquidityKind kind;
bytes userData;
}
/*******************************************************************************
Remove liquidity
*******************************************************************************/
enum RemoveLiquidityKind {
PROPORTIONAL,
SINGLE_TOKEN_EXACT_IN,
SINGLE_TOKEN_EXACT_OUT,
CUSTOM
}
/**
* @notice Data for an remove liquidity operation.
* @param pool Address of the pool
* @param from Address of user to burn from
* @param maxBptAmountIn Maximum amount of input pool tokens
* @param minAmountsOut Minimum amounts of output tokens
* @param kind Remove liquidity kind
* @param userData Optional user data
*/
struct RemoveLiquidityParams {
address pool;
address from;
uint256 maxBptAmountIn;
uint256[] minAmountsOut;
RemoveLiquidityKind kind;
bytes userData;
}
/*******************************************************************************
Remove liquidity
*******************************************************************************/
enum WrappingDirection {
WRAP,
UNWRAP
}
/**
* @notice Data for a wrap/unwrap operation.
* @param kind Type of swap (Exact In or Exact Out)
* @param direction Direction of the wrapping operation (Wrap or Unwrap)
* @param wrappedToken Wrapped token, compatible with interface ERC4626
* @param amountGivenRaw Amount specified for tokenIn or tokenOut (depends on the type of swap and wrapping direction)
* @param limitRaw Minimum or maximum amount specified for the other token (depends on the type of swap and wrapping
* direction)
*/
struct BufferWrapOrUnwrapParams {
SwapKind kind;
WrappingDirection direction;
IERC4626 wrappedToken;
uint256 amountGivenRaw;
uint256 limitRaw;
}
// Protocol Fees are 24-bit values. We transform them by multiplying by 1e11, so that they can be set to any value
// between 0% and 100% (step 0.00001%). Protocol and pool creator fees are set in the `ProtocolFeeController`, and
// ensure both constituent and aggregate fees do not exceed this precision.
uint256 constant FEE_BITLENGTH = 24;
uint256 constant FEE_SCALING_FACTOR = 1e11;
// Used to ensure the safety of fee-related math (e.g., pools or hooks don't set it greater than 100%).
// This value should work for practical purposes and is well within the max precision requirements.
uint256 constant MAX_FEE_PERCENTAGE = 99.9999e16; // 99.9999%
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol";
import { Authentication } from "@balancer-labs/v3-solidity-utils/contracts/helpers/Authentication.sol";
/// @dev Base contract for performing access control on external functions within pools.
abstract contract BasePoolAuthentication is Authentication {
IVault private immutable _vault;
/**
* @dev Pools should use the pool factory as the disambiguator passed into the base Authentication contract.
* Otherwise, permissions would conflict if different pools reused function names.
*/
constructor(IVault vault, address factory) Authentication(bytes32(uint256(uint160(factory)))) {
_vault = vault;
}
// Access control is delegated to the Authorizer in the `_canPerform` functions.
function _canPerform(bytes32 actionId, address user) internal view override returns (bool) {
return _vault.getAuthorizer().canPerform(actionId, user, address(this));
}
function _canPerform(bytes32 actionId, address account, address where) internal view returns (bool) {
return _vault.getAuthorizer().canPerform(actionId, account, where);
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { TokenInfo, PoolConfig } from "@balancer-labs/v3-interfaces/contracts/vault/VaultTypes.sol";
import { IPoolInfo } from "@balancer-labs/v3-interfaces/contracts/pool-utils/IPoolInfo.sol";
import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol";
/**
* @notice Standard implementation of the `IPoolInfo` interface.
* @dev Balancer standard pools inherit from this optional interface to provide a standard off-chain interface for
* commonly requested data.
*/
contract PoolInfo is IPoolInfo {
IVault private immutable _vault;
constructor(IVault vault) {
_vault = vault;
}
/// @inheritdoc IPoolInfo
function getTokens() external view returns (IERC20[] memory tokens) {
return _vault.getPoolTokens(address(this));
}
/// @inheritdoc IPoolInfo
function getTokenInfo()
external
view
returns (
IERC20[] memory tokens,
TokenInfo[] memory tokenInfo,
uint256[] memory balancesRaw,
uint256[] memory lastBalancesLiveScaled18
)
{
return _vault.getPoolTokenInfo(address(this));
}
/// @inheritdoc IPoolInfo
function getCurrentLiveBalances() external view returns (uint256[] memory balancesLiveScaled18) {
return _vault.getCurrentLiveBalances(address(this));
}
/// @inheritdoc IPoolInfo
function getStaticSwapFeePercentage() external view returns (uint256) {
return _vault.getStaticSwapFeePercentage((address(this)));
}
/// @inheritdoc IPoolInfo
function getAggregateFeePercentages()
external
view
returns (uint256 aggregateSwapFeePercentage, uint256 aggregateYieldFeePercentage)
{
PoolConfig memory poolConfig = _vault.getPoolConfig(address(this));
aggregateSwapFeePercentage = poolConfig.aggregateSwapFeePercentage;
aggregateYieldFeePercentage = poolConfig.aggregateYieldFeePercentage;
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IAuthentication } from "@balancer-labs/v3-interfaces/contracts/solidity-utils/helpers/IAuthentication.sol";
/**
* @notice Building block for performing access control on external functions.
* @dev This contract is used via the `authenticate` modifier (or the `_authenticateCaller` function), which can be
* applied to external functions to make them only callable by authorized accounts.
*
* Derived contracts must implement the `_canPerform` function, which holds the actual access control logic.
*/
abstract contract Authentication is IAuthentication {
bytes32 private immutable _actionIdDisambiguator;
/**
* @dev The main purpose of the `actionIdDisambiguator` is to prevent accidental function selector collisions in
* multi-contract systems.
*
* There are two main uses for it:
* - if the contract is a singleton, any unique identifier can be used to make the associated action identifiers
* unique. The contract's own address is a good option.
* - if the contract belongs to a family that shares action identifiers for the same functions, an identifier
* shared by the entire family (and no other contract) should be used instead.
*/
constructor(bytes32 actionIdDisambiguator) {
_actionIdDisambiguator = actionIdDisambiguator;
}
/// @dev Reverts unless the caller is allowed to call this function. Should only be applied to external functions.
modifier authenticate() {
_authenticateCaller();
_;
}
/// @dev Reverts unless the caller is allowed to call the entry point function.
function _authenticateCaller() internal view {
bytes32 actionId = getActionId(msg.sig);
if (!_canPerform(actionId, msg.sender)) {
revert SenderNotAllowed();
}
}
/// @inheritdoc IAuthentication
function getActionId(bytes4 selector) public view override returns (bytes32) {
// Each external function is dynamically assigned an action identifier as the hash of the disambiguator and the
// function selector. Disambiguation is necessary to avoid potential collisions in the function selectors of
// multiple contracts.
return keccak256(abi.encodePacked(_actionIdDisambiguator, selector));
}
/**
* @dev Derived contracts must implement this function to perform the actual access control logic.
* @param actionId The action identifier associated with an external function
* @param user The account performing the action
* @return success True if the action is permitted
*/
function _canPerform(bytes32 actionId, address user) internal view virtual returns (bool);
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IVersion } from "@balancer-labs/v3-interfaces/contracts/solidity-utils/helpers/IVersion.sol";
/**
* @notice Retrieves a contract's version from storage.
* @dev The version is set at deployment time and cannot be changed. It would be immutable, but immutable strings
* are not yet supported.
*
* Contracts like factories and pools should have versions. These typically take the form of JSON strings containing
* detailed information about the deployment. For instance:
*
* `{name: 'ChildChainGaugeFactory', version: 2, deployment: '20230316-child-chain-gauge-factory-v2'}`
*/
contract Version is IVersion {
string private _version;
constructor(string memory version_) {
_setVersion(version_);
}
/**
* @notice Getter for the version.
* @return version The stored contract version
*/
function version() external view returns (string memory) {
return _version;
}
/// @dev Internal setter that allows this contract to be used in proxies.
function _setVersion(string memory newVersion) internal {
_version = newVersion;
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { LogExpMath } from "./LogExpMath.sol";
/// @notice Support 18-decimal fixed point arithmetic. All Vault calculations use this for high and uniform precision.
library FixedPoint {
/// @notice Attempted division by zero.
error ZeroDivision();
// solhint-disable no-inline-assembly
// solhint-disable private-vars-leading-underscore
uint256 internal constant ONE = 1e18; // 18 decimal places
uint256 internal constant TWO = 2 * ONE;
uint256 internal constant FOUR = 4 * ONE;
uint256 internal constant MAX_POW_RELATIVE_ERROR = 10000; // 10^(-14)
function mulDown(uint256 a, uint256 b) internal pure returns (uint256) {
// Multiplication overflow protection is provided by Solidity 0.8.x.
uint256 product = a * b;
return product / ONE;
}
function mulUp(uint256 a, uint256 b) internal pure returns (uint256 result) {
// Multiplication overflow protection is provided by Solidity 0.8.x.
uint256 product = a * b;
// Equivalent to:
// result = product == 0 ? 0 : ((product - 1) / FixedPoint.ONE) + 1
assembly ("memory-safe") {
result := mul(iszero(iszero(product)), add(div(sub(product, 1), ONE), 1))
}
}
function divDown(uint256 a, uint256 b) internal pure returns (uint256) {
// Solidity 0.8 reverts with a Panic code (0x11) if the multiplication overflows.
uint256 aInflated = a * ONE;
// Solidity 0.8 reverts with a "Division by Zero" Panic code (0x12) if b is zero
return aInflated / b;
}
function divUp(uint256 a, uint256 b) internal pure returns (uint256 result) {
return mulDivUp(a, ONE, b);
}
/// @dev Return (a * b) / c, rounding up.
function mulDivUp(uint256 a, uint256 b, uint256 c) internal pure returns (uint256 result) {
// This check is required because Yul's `div` doesn't revert on c==0.
if (c == 0) {
revert ZeroDivision();
}
// Multiple overflow protection is done by Solidity 0.8.x.
uint256 product = a * b;
// The traditional divUp formula is:
// divUp(x, y) := (x + y - 1) / y
// To avoid intermediate overflow in the addition, we distribute the division and get:
// divUp(x, y) := (x - 1) / y + 1
// Note that this requires x != 0, if x == 0 then the result is zero
//
// Equivalent to:
// result = a == 0 ? 0 : (a * b - 1) / c + 1
assembly ("memory-safe") {
result := mul(iszero(iszero(product)), add(div(sub(product, 1), c), 1))
}
}
/**
* @dev Version of divUp when the input is raw (i.e., already "inflated"). For instance,
* invariant * invariant (36 decimals) vs. invariant.mulDown(invariant) (18 decimal FP).
* This can occur in calculations with many successive multiplications and divisions, and
* we want to minimize the number of operations by avoiding unnecessary scaling by ONE.
*/
function divUpRaw(uint256 a, uint256 b) internal pure returns (uint256 result) {
// This check is required because Yul's `div` doesn't revert on b==0.
if (b == 0) {
revert ZeroDivision();
}
// Equivalent to:
// result = a == 0 ? 0 : 1 + (a - 1) / b
assembly ("memory-safe") {
result := mul(iszero(iszero(a)), add(1, div(sub(a, 1), b)))
}
}
/**
* @dev Returns x^y, assuming both are fixed point numbers, rounding down. The result is guaranteed to not be above
* the true value (that is, the error function expected - actual is always positive).
*/
function powDown(uint256 x, uint256 y) internal pure returns (uint256) {
// Optimize for when y equals 1.0, 2.0 or 4.0, as those are very simple to implement and occur often in 50/50
// and 80/20 Weighted Pools
if (y == ONE) {
return x;
} else if (y == TWO) {
return mulDown(x, x);
} else if (y == FOUR) {
uint256 square = mulDown(x, x);
return mulDown(square, square);
} else {
uint256 raw = LogExpMath.pow(x, y);
uint256 maxError = mulUp(raw, MAX_POW_RELATIVE_ERROR) + 1;
if (raw < maxError) {
return 0;
} else {
unchecked {
return raw - maxError;
}
}
}
}
/**
* @dev Returns x^y, assuming both are fixed point numbers, rounding up. The result is guaranteed to not be below
* the true value (that is, the error function expected - actual is always negative).
*/
function powUp(uint256 x, uint256 y) internal pure returns (uint256) {
// Optimize for when y equals 1.0, 2.0 or 4.0, as those are very simple to implement and occur often in 50/50
// and 80/20 Weighted Pools
if (y == ONE) {
return x;
} else if (y == TWO) {
return mulUp(x, x);
} else if (y == FOUR) {
uint256 square = mulUp(x, x);
return mulUp(square, square);
} else {
uint256 raw = LogExpMath.pow(x, y);
uint256 maxError = mulUp(raw, MAX_POW_RELATIVE_ERROR) + 1;
return raw + maxError;
}
}
/**
* @dev Returns the complement of a value (1 - x), capped to 0 if x is larger than 1.
*
* Useful when computing the complement for values with some level of relative error, as it strips this error and
* prevents intermediate negative values.
*/
function complement(uint256 x) internal pure returns (uint256 result) {
// Equivalent to:
// result = (x < ONE) ? (ONE - x) : 0
assembly ("memory-safe") {
result := mul(lt(x, ONE), sub(ONE, x))
}
}
}
// SPDX-License-Identifier: MIT
pragma solidity ^0.8.24;
// solhint-disable
/**
* @dev Exponentiation and logarithm functions for 18 decimal fixed point numbers (both base and exponent/argument).
*
* Exponentiation and logarithm with arbitrary bases (x^y and log_x(y)) are implemented by conversion to natural
* exponentiation and logarithm (where the base is Euler's number).
*
* All math operations are unchecked in order to save gas.
*
* @author Fernando Martinelli - @fernandomartinelli
* @author Sergio Yuhjtman - @sergioyuhjtman
* @author Daniel Fernandez - @dmf7z
*/
library LogExpMath {
/// @notice This error is thrown when a base is not within an acceptable range.
error BaseOutOfBounds();
/// @notice This error is thrown when a exponent is not within an acceptable range.
error ExponentOutOfBounds();
/// @notice This error is thrown when the exponent * ln(base) is not within an acceptable range.
error ProductOutOfBounds();
/// @notice This error is thrown when an exponent used in the exp function is not within an acceptable range.
error InvalidExponent();
/// @notice This error is thrown when a variable or result is not within the acceptable bounds defined in the function.
error OutOfBounds();
// All fixed point multiplications and divisions are inlined. This means we need to divide by ONE when multiplying
// two numbers, and multiply by ONE when dividing them.
// All arguments and return values are 18 decimal fixed point numbers.
int256 constant ONE_18 = 1e18;
// Internally, intermediate values are computed with higher precision as 20 decimal fixed point numbers, and in the
// case of ln36, 36 decimals.
int256 constant ONE_20 = 1e20;
int256 constant ONE_36 = 1e36;
// The domain of natural exponentiation is bound by the word size and number of decimals used.
//
// Because internally the result will be stored using 20 decimals, the largest possible result is
// (2^255 - 1) / 10^20, which makes the largest exponent ln((2^255 - 1) / 10^20) = 130.700829182905140221.
// The smallest possible result is 10^(-18), which makes largest negative argument
// ln(10^(-18)) = -41.446531673892822312.
// We use 130.0 and -41.0 to have some safety margin.
int256 constant MAX_NATURAL_EXPONENT = 130e18;
int256 constant MIN_NATURAL_EXPONENT = -41e18;
// Bounds for ln_36's argument. Both ln(0.9) and ln(1.1) can be represented with 36 decimal places in a fixed point
// 256 bit integer.
int256 constant LN_36_LOWER_BOUND = ONE_18 - 1e17;
int256 constant LN_36_UPPER_BOUND = ONE_18 + 1e17;
uint256 constant MILD_EXPONENT_BOUND = 2 ** 254 / uint256(ONE_20);
// 18 decimal constants
int256 constant x0 = 128000000000000000000; // 2ˆ7
int256 constant a0 = 38877084059945950922200000000000000000000000000000000000; // eˆ(x0) (no decimals)
int256 constant x1 = 64000000000000000000; // 2ˆ6
int256 constant a1 = 6235149080811616882910000000; // eˆ(x1) (no decimals)
// 20 decimal constants
int256 constant x2 = 3200000000000000000000; // 2ˆ5
int256 constant a2 = 7896296018268069516100000000000000; // eˆ(x2)
int256 constant x3 = 1600000000000000000000; // 2ˆ4
int256 constant a3 = 888611052050787263676000000; // eˆ(x3)
int256 constant x4 = 800000000000000000000; // 2ˆ3
int256 constant a4 = 298095798704172827474000; // eˆ(x4)
int256 constant x5 = 400000000000000000000; // 2ˆ2
int256 constant a5 = 5459815003314423907810; // eˆ(x5)
int256 constant x6 = 200000000000000000000; // 2ˆ1
int256 constant a6 = 738905609893065022723; // eˆ(x6)
int256 constant x7 = 100000000000000000000; // 2ˆ0
int256 constant a7 = 271828182845904523536; // eˆ(x7)
int256 constant x8 = 50000000000000000000; // 2ˆ-1
int256 constant a8 = 164872127070012814685; // eˆ(x8)
int256 constant x9 = 25000000000000000000; // 2ˆ-2
int256 constant a9 = 128402541668774148407; // eˆ(x9)
int256 constant x10 = 12500000000000000000; // 2ˆ-3
int256 constant a10 = 113314845306682631683; // eˆ(x10)
int256 constant x11 = 6250000000000000000; // 2ˆ-4
int256 constant a11 = 106449445891785942956; // eˆ(x11)
/**
* @dev Exponentiation (x^y) with unsigned 18 decimal fixed point base and exponent.
*
* Reverts if ln(x) * y is smaller than `MIN_NATURAL_EXPONENT`, or larger than `MAX_NATURAL_EXPONENT`.
*/
function pow(uint256 x, uint256 y) internal pure returns (uint256) {
if (y == 0) {
// We solve the 0^0 indetermination by making it equal one.
return uint256(ONE_18);
}
if (x == 0) {
return 0;
}
// Instead of computing x^y directly, we instead rely on the properties of logarithms and exponentiation to
// arrive at that result. In particular, exp(ln(x)) = x, and ln(x^y) = y * ln(x). This means
// x^y = exp(y * ln(x)).
// The ln function takes a signed value, so we need to make sure x fits in the signed 256 bit range.
if (x >> 255 != 0) {
revert BaseOutOfBounds();
}
int256 x_int256 = int256(x);
// We will compute y * ln(x) in a single step. Depending on the value of x, we can either use ln or ln_36. In
// both cases, we leave the division by ONE_18 (due to fixed point multiplication) to the end.
// This prevents y * ln(x) from overflowing, and at the same time guarantees y fits in the signed 256 bit range.
if (y >= MILD_EXPONENT_BOUND) {
revert ExponentOutOfBounds();
}
int256 y_int256 = int256(y);
int256 logx_times_y;
unchecked {
if (LN_36_LOWER_BOUND < x_int256 && x_int256 < LN_36_UPPER_BOUND) {
int256 ln_36_x = _ln_36(x_int256);
// ln_36_x has 36 decimal places, so multiplying by y_int256 isn't as straightforward, since we can't just
// bring y_int256 to 36 decimal places, as it might overflow. Instead, we perform two 18 decimal
// multiplications and add the results: one with the first 18 decimals of ln_36_x, and one with the
// (downscaled) last 18 decimals.
logx_times_y = ((ln_36_x / ONE_18) * y_int256 + ((ln_36_x % ONE_18) * y_int256) / ONE_18);
} else {
logx_times_y = _ln(x_int256) * y_int256;
}
logx_times_y /= ONE_18;
}
// Finally, we compute exp(y * ln(x)) to arrive at x^y
if (!(MIN_NATURAL_EXPONENT <= logx_times_y && logx_times_y <= MAX_NATURAL_EXPONENT)) {
revert ProductOutOfBounds();
}
return uint256(exp(logx_times_y));
}
/**
* @dev Natural exponentiation (e^x) with signed 18 decimal fixed point exponent.
*
* Reverts if `x` is smaller than MIN_NATURAL_EXPONENT, or larger than `MAX_NATURAL_EXPONENT`.
*/
function exp(int256 x) internal pure returns (int256) {
if (!(x >= MIN_NATURAL_EXPONENT && x <= MAX_NATURAL_EXPONENT)) {
revert InvalidExponent();
}
// We avoid using recursion here because zkSync doesn't support it.
bool negativeExponent = false;
if (x < 0) {
// We only handle positive exponents: e^(-x) is computed as 1 / e^x. We can safely make x positive since it
// fits in the signed 256 bit range (as it is larger than MIN_NATURAL_EXPONENT). In the negative
// exponent case, compute e^x, then return 1 / result.
unchecked {
x = -x;
}
negativeExponent = true;
}
// First, we use the fact that e^(x+y) = e^x * e^y to decompose x into a sum of powers of two, which we call x_n,
// where x_n == 2^(7 - n), and e^x_n = a_n has been precomputed. We choose the first x_n, x0, to equal 2^7
// because all larger powers are larger than MAX_NATURAL_EXPONENT, and therefore not present in the
// decomposition.
// At the end of this process we will have the product of all e^x_n = a_n that apply, and the remainder of this
// decomposition, which will be lower than the smallest x_n.
// exp(x) = k_0 * a_0 * k_1 * a_1 * ... + k_n * a_n * exp(remainder), where each k_n equals either 0 or 1.
// We mutate x by subtracting x_n, making it the remainder of the decomposition.
// The first two a_n (e^(2^7) and e^(2^6)) are too large if stored as 18 decimal numbers, and could cause
// intermediate overflows. Instead we store them as plain integers, with 0 decimals.
// Additionally, x0 + x1 is larger than MAX_NATURAL_EXPONENT, which means they will not both be present in the
// decomposition.
// For each x_n, we test if that term is present in the decomposition (if x is larger than it), and if so deduct
// it and compute the accumulated product.
int256 firstAN;
unchecked {
if (x >= x0) {
x -= x0;
firstAN = a0;
} else if (x >= x1) {
x -= x1;
firstAN = a1;
} else {
firstAN = 1; // One with no decimal places
}
// We now transform x into a 20 decimal fixed point number, to have enhanced precision when computing the
// smaller terms.
x *= 100;
}
// `product` is the accumulated product of all a_n (except a0 and a1), which starts at 20 decimal fixed point
// one. Recall that fixed point multiplication requires dividing by ONE_20.
int256 product = ONE_20;
unchecked {
if (x >= x2) {
x -= x2;
product = (product * a2) / ONE_20;
}
if (x >= x3) {
x -= x3;
product = (product * a3) / ONE_20;
}
if (x >= x4) {
x -= x4;
product = (product * a4) / ONE_20;
}
if (x >= x5) {
x -= x5;
product = (product * a5) / ONE_20;
}
if (x >= x6) {
x -= x6;
product = (product * a6) / ONE_20;
}
if (x >= x7) {
x -= x7;
product = (product * a7) / ONE_20;
}
if (x >= x8) {
x -= x8;
product = (product * a8) / ONE_20;
}
if (x >= x9) {
x -= x9;
product = (product * a9) / ONE_20;
}
}
// x10 and x11 are unnecessary here since we have high enough precision already.
// Now we need to compute e^x, where x is small (in particular, it is smaller than x9). We use the Taylor series
// expansion for e^x: 1 + x + (x^2 / 2!) + (x^3 / 3!) + ... + (x^n / n!).
int256 seriesSum = ONE_20; // The initial one in the sum, with 20 decimal places.
int256 term; // Each term in the sum, where the nth term is (x^n / n!).
// The first term is simply x.
term = x;
unchecked {
seriesSum += term;
// Each term (x^n / n!) equals the previous one times x, divided by n. Since x is a fixed point number,
// multiplying by it requires dividing by ONE_20, but dividing by the non-fixed point n values does not.
term = ((term * x) / ONE_20) / 2;
seriesSum += term;
term = ((term * x) / ONE_20) / 3;
seriesSum += term;
term = ((term * x) / ONE_20) / 4;
seriesSum += term;
term = ((term * x) / ONE_20) / 5;
seriesSum += term;
term = ((term * x) / ONE_20) / 6;
seriesSum += term;
term = ((term * x) / ONE_20) / 7;
seriesSum += term;
term = ((term * x) / ONE_20) / 8;
seriesSum += term;
term = ((term * x) / ONE_20) / 9;
seriesSum += term;
term = ((term * x) / ONE_20) / 10;
seriesSum += term;
term = ((term * x) / ONE_20) / 11;
seriesSum += term;
term = ((term * x) / ONE_20) / 12;
seriesSum += term;
// 12 Taylor terms are sufficient for 18 decimal precision.
// We now have the first a_n (with no decimals), and the product of all other a_n present, and the Taylor
// approximation of the exponentiation of the remainder (both with 20 decimals). All that remains is to multiply
// all three (one 20 decimal fixed point multiplication, dividing by ONE_20, and one integer multiplication),
// and then drop two digits to return an 18 decimal value.
int256 result = (((product * seriesSum) / ONE_20) * firstAN) / 100;
// We avoid using recursion here because zkSync doesn't support it.
return negativeExponent ? (ONE_18 * ONE_18) / result : result;
}
}
/// @dev Logarithm (log(arg, base), with signed 18 decimal fixed point base and argument.
function log(int256 arg, int256 base) internal pure returns (int256) {
// This performs a simple base change: log(arg, base) = ln(arg) / ln(base).
// Both logBase and logArg are computed as 36 decimal fixed point numbers, either by using ln_36, or by
// upscaling.
int256 logBase;
unchecked {
if (LN_36_LOWER_BOUND < base && base < LN_36_UPPER_BOUND) {
logBase = _ln_36(base);
} else {
logBase = _ln(base) * ONE_18;
}
}
int256 logArg;
unchecked {
if (LN_36_LOWER_BOUND < arg && arg < LN_36_UPPER_BOUND) {
logArg = _ln_36(arg);
} else {
logArg = _ln(arg) * ONE_18;
}
// When dividing, we multiply by ONE_18 to arrive at a result with 18 decimal places
return (logArg * ONE_18) / logBase;
}
}
/// @dev Natural logarithm (ln(a)) with signed 18 decimal fixed point argument.
function ln(int256 a) internal pure returns (int256) {
// The real natural logarithm is not defined for negative numbers or zero.
if (a <= 0) {
revert OutOfBounds();
}
if (LN_36_LOWER_BOUND < a && a < LN_36_UPPER_BOUND) {
unchecked {
return _ln_36(a) / ONE_18;
}
} else {
return _ln(a);
}
}
/// @dev Internal natural logarithm (ln(a)) with signed 18 decimal fixed point argument.
function _ln(int256 a) private pure returns (int256) {
// We avoid using recursion here because zkSync doesn't support it.
bool negativeExponent = false;
if (a < ONE_18) {
// Since ln(a^k) = k * ln(a), we can compute ln(a) as ln(a) = ln((1/a)^(-1)) = - ln((1/a)). If a is less
// than one, 1/a will be greater than one, so in this case we compute ln(1/a) and negate the final result.
unchecked {
a = (ONE_18 * ONE_18) / a;
}
negativeExponent = true;
}
// First, we use the fact that ln^(a * b) = ln(a) + ln(b) to decompose ln(a) into a sum of powers of two, which
// we call x_n, where x_n == 2^(7 - n), which are the natural logarithm of precomputed quantities a_n (that is,
// ln(a_n) = x_n). We choose the first x_n, x0, to equal 2^7 because the exponential of all larger powers cannot
// be represented as 18 fixed point decimal numbers in 256 bits, and are therefore larger than a.
// At the end of this process we will have the sum of all x_n = ln(a_n) that apply, and the remainder of this
// decomposition, which will be lower than the smallest a_n.
// ln(a) = k_0 * x_0 + k_1 * x_1 + ... + k_n * x_n + ln(remainder), where each k_n equals either 0 or 1.
// We mutate a by subtracting a_n, making it the remainder of the decomposition.
// For reasons related to how `exp` works, the first two a_n (e^(2^7) and e^(2^6)) are not stored as fixed point
// numbers with 18 decimals, but instead as plain integers with 0 decimals, so we need to multiply them by
// ONE_18 to convert them to fixed point.
// For each a_n, we test if that term is present in the decomposition (if a is larger than it), and if so divide
// by it and compute the accumulated sum.
int256 sum = 0;
unchecked {
if (a >= a0 * ONE_18) {
a /= a0; // Integer, not fixed point division
sum += x0;
}
if (a >= a1 * ONE_18) {
a /= a1; // Integer, not fixed point division
sum += x1;
}
// All other a_n and x_n are stored as 20 digit fixed point numbers, so we convert the sum and a to this format.
sum *= 100;
a *= 100;
// Because further a_n are 20 digit fixed point numbers, we multiply by ONE_20 when dividing by them.
if (a >= a2) {
a = (a * ONE_20) / a2;
sum += x2;
}
if (a >= a3) {
a = (a * ONE_20) / a3;
sum += x3;
}
if (a >= a4) {
a = (a * ONE_20) / a4;
sum += x4;
}
if (a >= a5) {
a = (a * ONE_20) / a5;
sum += x5;
}
if (a >= a6) {
a = (a * ONE_20) / a6;
sum += x6;
}
if (a >= a7) {
a = (a * ONE_20) / a7;
sum += x7;
}
if (a >= a8) {
a = (a * ONE_20) / a8;
sum += x8;
}
if (a >= a9) {
a = (a * ONE_20) / a9;
sum += x9;
}
if (a >= a10) {
a = (a * ONE_20) / a10;
sum += x10;
}
if (a >= a11) {
a = (a * ONE_20) / a11;
sum += x11;
}
}
// a is now a small number (smaller than a_11, which roughly equals 1.06). This means we can use a Taylor series
// that converges rapidly for values of `a` close to one - the same one used in ln_36.
// Let z = (a - 1) / (a + 1).
// ln(a) = 2 * (z + z^3 / 3 + z^5 / 5 + z^7 / 7 + ... + z^(2 * n + 1) / (2 * n + 1))
// Recall that 20 digit fixed point division requires multiplying by ONE_20, and multiplication requires
// division by ONE_20.
unchecked {
int256 z = ((a - ONE_20) * ONE_20) / (a + ONE_20);
int256 z_squared = (z * z) / ONE_20;
// num is the numerator of the series: the z^(2 * n + 1) term
int256 num = z;
// seriesSum holds the accumulated sum of each term in the series, starting with the initial z
int256 seriesSum = num;
// In each step, the numerator is multiplied by z^2
num = (num * z_squared) / ONE_20;
seriesSum += num / 3;
num = (num * z_squared) / ONE_20;
seriesSum += num / 5;
num = (num * z_squared) / ONE_20;
seriesSum += num / 7;
num = (num * z_squared) / ONE_20;
seriesSum += num / 9;
num = (num * z_squared) / ONE_20;
seriesSum += num / 11;
// 6 Taylor terms are sufficient for 36 decimal precision.
// Finally, we multiply by 2 (non fixed point) to compute ln(remainder)
seriesSum *= 2;
// We now have the sum of all x_n present, and the Taylor approximation of the logarithm of the remainder (both
// with 20 decimals). All that remains is to sum these two, and then drop two digits to return a 18 decimal
// value.
int256 result = (sum + seriesSum) / 100;
// We avoid using recursion here because zkSync doesn't support it.
return negativeExponent ? -result : result;
}
}
/**
* @dev Internal high precision (36 decimal places) natural logarithm (ln(x)) with signed 18 decimal fixed point argument,
* for x close to one.
*
* Should only be used if x is between LN_36_LOWER_BOUND and LN_36_UPPER_BOUND.
*/
function _ln_36(int256 x) private pure returns (int256) {
// Since ln(1) = 0, a value of x close to one will yield a very small result, which makes using 36 digits
// worthwhile.
// First, we transform x to a 36 digit fixed point value.
unchecked {
x *= ONE_18;
// We will use the following Taylor expansion, which converges very rapidly. Let z = (x - 1) / (x + 1).
// ln(x) = 2 * (z + z^3 / 3 + z^5 / 5 + z^7 / 7 + ... + z^(2 * n + 1) / (2 * n + 1))
// Recall that 36 digit fixed point division requires multiplying by ONE_36, and multiplication requires
// division by ONE_36.
int256 z = ((x - ONE_36) * ONE_36) / (x + ONE_36);
int256 z_squared = (z * z) / ONE_36;
// num is the numerator of the series: the z^(2 * n + 1) term
int256 num = z;
// seriesSum holds the accumulated sum of each term in the series, starting with the initial z
int256 seriesSum = num;
// In each step, the numerator is multiplied by z^2
num = (num * z_squared) / ONE_36;
seriesSum += num / 3;
num = (num * z_squared) / ONE_36;
seriesSum += num / 5;
num = (num * z_squared) / ONE_36;
seriesSum += num / 7;
num = (num * z_squared) / ONE_36;
seriesSum += num / 9;
num = (num * z_squared) / ONE_36;
seriesSum += num / 11;
num = (num * z_squared) / ONE_36;
seriesSum += num / 13;
num = (num * z_squared) / ONE_36;
seriesSum += num / 15;
// 8 Taylor terms are sufficient for 36 decimal precision.
// All that remains is multiplying by 2 (non fixed point).
return seriesSum * 2;
}
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { FixedPoint } from "./FixedPoint.sol";
/**
* @notice Stable Pool math library based on Curve's `StableSwap`.
* @dev See https://docs.curve.fi/references/whitepapers/stableswap/
*
* For security reasons, to help ensure that for all possible "round trip" paths the caller always receives the same
* or fewer tokens than supplied, we have used precise math (i.e., '*', '/' vs. FixedPoint) whenever possible, and
* chosen the rounding direction to favor the protocol elsewhere.
*
* `computeInvariant` does not use the rounding direction from `IBasePool`, effectively always rounding down to match
* the Curve implementation.
*/
library StableMath {
using FixedPoint for uint256;
// Some variables have non mixed case names (e.g. P_D) that relate to the mathematical derivations.
// solhint-disable private-vars-leading-underscore, var-name-mixedcase
/// @notice The iterations to calculate the invariant didn't converge.
error StableInvariantDidNotConverge();
/// @notice The iterations to calculate the balance didn't converge.
error StableComputeBalanceDidNotConverge();
// The max token count is limited by the math, and is less than the Vault's maximum.
uint256 public constant MAX_STABLE_TOKENS = 5;
uint256 internal constant MIN_AMP = 1;
uint256 internal constant MAX_AMP = 5000;
uint256 internal constant AMP_PRECISION = 1e3;
// Invariant growth limit: non-proportional add cannot cause the invariant to increase by more than this ratio.
uint256 internal constant MIN_INVARIANT_RATIO = 60e16; // 60%
// Invariant shrink limit: non-proportional remove cannot cause the invariant to decrease by less than this ratio.
uint256 internal constant MAX_INVARIANT_RATIO = 500e16; // 500%
// Note on unchecked arithmetic:
// This contract performs a large number of additions, subtractions, multiplications and divisions, often inside
// loops. Since many of these operations are gas-sensitive (as they happen e.g. during a swap), it is important to
// not make any unnecessary checks. We rely on a set of invariants to avoid having to use checked arithmetic,
// including:
// - the amplification parameter is bounded by MAX_AMP * AMP_PRECISION, which fits in 23 bits
//
// This means e.g. we can safely multiply a balance by the amplification parameter without worrying about overflow.
// About swap fees on add and remove liquidity:
// Any add or remove that is not perfectly balanced (e.g. all single token operations) is mathematically
// equivalent to a perfectly balanced add or remove followed by a series of swaps. Since these swaps would charge
// swap fees, it follows that unbalanced adds and removes should as well.
//
// On these operations, we split the token amounts in 'taxable' and 'non-taxable' portions, where the 'taxable' part
// is the one to which swap fees are applied.
// See: https://github.com/curvefi/curve-contract/blob/b0bbf77f8f93c9c5f4e415bce9cd71f0cdee960e/contracts/pool-templates/base/SwapTemplateBase.vy#L206
// solhint-disable-previous-line max-line-length
/**
* @notice Computes the invariant given the current balances.
* @dev It uses the Newton-Raphson approximation. The amplification parameter is given by: A n^(n-1).
* There is no closed-form solution, so the calculation is iterative and may revert.
*
* @param amplificationParameter The current amplification parameter
* @param balances The current balances
* @return invariant The calculated invariant of the pool
*/
function computeInvariant(
uint256 amplificationParameter,
uint256[] memory balances
) internal pure returns (uint256) {
/**********************************************************************************************
// invariant //
// D = invariant D^(n+1) //
// A = amplification coefficient A n^n S + D = A D n^n + ----------- //
// S = sum of balances n^n P //
// P = product of balances //
// n = number of tokens //
**********************************************************************************************/
uint256 sum = 0; // S in the Curve version
uint256 numTokens = balances.length;
for (uint256 i = 0; i < numTokens; ++i) {
sum = sum + balances[i];
}
if (sum == 0) {
return 0;
}
uint256 prevInvariant; // Dprev in the Curve version
uint256 invariant = sum; // D in the Curve version
uint256 ampTimesTotal = amplificationParameter * numTokens; // Ann in the Curve version
for (uint256 i = 0; i < 255; ++i) {
uint256 D_P = invariant;
for (uint256 j = 0; j < numTokens; ++j) {
D_P = (D_P * invariant) / (balances[j] * numTokens);
}
prevInvariant = invariant;
invariant =
((((ampTimesTotal * sum) / AMP_PRECISION) + (D_P * numTokens)) * invariant) /
((((ampTimesTotal - AMP_PRECISION) * invariant) / AMP_PRECISION) + ((numTokens + 1) * D_P));
unchecked {
// We are explicitly checking the magnitudes here, so can use unchecked math.
if (invariant > prevInvariant) {
if (invariant - prevInvariant <= 1) {
return invariant;
}
} else if (prevInvariant - invariant <= 1) {
return invariant;
}
}
}
revert StableInvariantDidNotConverge();
}
/**
* @notice Computes the required `amountOut` of tokenOut, for `tokenAmountIn` of tokenIn.
* @dev The calculation uses the Newton-Raphson approximation. The amplification parameter is given by: A n^(n-1).
* @param amplificationParameter The current amplification factor
* @param balances The current pool balances
* @param tokenIndexIn The index of tokenIn
* @param tokenIndexOut The index of tokenOut
* @param tokenAmountIn The exact amount of tokenIn specified for the swap
* @param invariant The current invariant
* @return amountOut The calculated amount of tokenOut required for the swap
*/
function computeOutGivenExactIn(
uint256 amplificationParameter,
uint256[] memory balances,
uint256 tokenIndexIn,
uint256 tokenIndexOut,
uint256 tokenAmountIn,
uint256 invariant
) internal pure returns (uint256) {
/**************************************************************************************************************
// outGivenExactIn token x for y - polynomial equation to solve //
// ay = amount out to calculate //
// by = balance token out //
// y = by - ay (finalBalanceOut) //
// D = invariant D D^(n+1) //
// A = amplification coefficient y^2 + ( S + ---------- - D) * y - ------------- = 0 //
// n = number of tokens (A * n^n) A * n^2n * P //
// S = sum of final balances but y //
// P = product of final balances but y //
**************************************************************************************************************/
balances[tokenIndexIn] += tokenAmountIn;
// `computeBalance` rounds up.
uint256 finalBalanceOut = computeBalance(amplificationParameter, balances, invariant, tokenIndexOut);
// No need to use checked arithmetic since `tokenAmountIn` was actually added to the same balance right before
// calling `computeBalance`, which doesn't alter the balances array.
unchecked {
balances[tokenIndexIn] -= tokenAmountIn;
}
// Amount out, so we round down overall.
return balances[tokenIndexOut] - finalBalanceOut - 1;
}
/**
* @notice Computes the required `amountIn` of tokenIn, for `tokenAmountOut` of tokenOut.
* @dev The calculation uses the Newton-Raphson approximation. The amplification parameter is given by: A n^(n-1).
* @param amplificationParameter The current amplification factor
* @param balances The current pool balances
* @param tokenIndexIn The index of tokenIn
* @param tokenIndexOut The index of tokenOut
* @param tokenAmountOut The exact amount of tokenOut specified for the swap
* @param invariant The current invariant
* @return amountIn The calculated amount of tokenIn required for the swap
*/
function computeInGivenExactOut(
uint256 amplificationParameter,
uint256[] memory balances,
uint256 tokenIndexIn,
uint256 tokenIndexOut,
uint256 tokenAmountOut,
uint256 invariant
) internal pure returns (uint256) {
/**************************************************************************************************************
// inGivenExactOut token x for y - polynomial equation to solve //
// ax = amount in to calculate //
// bx = balance token in //
// x = bx + ax (finalBalanceIn) //
// D = invariant D D^(n+1) //
// A = amplification coefficient x^2 + ( S + ---------- - D) * x - ------------- = 0 //
// n = number of tokens (A * n^n) A * n^2n * P //
// S = sum of final balances but x //
// P = product of final balances but x //
**************************************************************************************************************/
balances[tokenIndexOut] -= tokenAmountOut;
// `computeBalance` rounds up.
uint256 finalBalanceIn = computeBalance(amplificationParameter, balances, invariant, tokenIndexIn);
// No need to use checked arithmetic since `tokenAmountOut` was actually subtracted from the same balance right
// before calling `computeBalance`, which doesn't alter the balances array.
unchecked {
balances[tokenIndexOut] += tokenAmountOut;
}
// Amount in, so we round up overall.
return finalBalanceIn - balances[tokenIndexIn] + 1;
}
/**
* @notice Calculate the balance of a given token (at tokenIndex), given all other balances and the invariant.
* @dev Rounds result up overall. There is no closed-form solution, so the calculation is iterative and may revert.
* @param amplificationParameter The current amplification factor
* @param balances The current pool balances
* @param invariant The current invariant
* @param tokenIndex The index of the token balance we are calculating
* @return tokenBalance The adjusted balance of the token at `tokenIn` that matches the given invariant
*/
function computeBalance(
uint256 amplificationParameter,
uint256[] memory balances,
uint256 invariant,
uint256 tokenIndex
) internal pure returns (uint256) {
uint256 numTokens = balances.length;
uint256 ampTimesTotal = amplificationParameter * numTokens;
uint256 sum = balances[0];
uint256 P_D = balances[0] * numTokens;
for (uint256 j = 1; j < numTokens; ++j) {
P_D = (P_D * balances[j] * numTokens) / invariant;
sum = sum + balances[j];
}
sum = sum - balances[tokenIndex];
// Use divUpRaw with inv2, as it is a "raw" 36 decimal value.
uint256 inv2 = invariant * invariant;
// We remove the balance from c by multiplying it.
uint256 c = (inv2 * AMP_PRECISION).divUpRaw(ampTimesTotal * P_D) * balances[tokenIndex];
uint256 b = sum + ((invariant * AMP_PRECISION) / ampTimesTotal);
// We iterate to find the balance.
uint256 prevTokenBalance = 0;
// We multiply the first iteration outside the loop with the invariant to set the value of the
// initial approximation.
uint256 tokenBalance = (inv2 + c).divUpRaw(invariant + b);
for (uint256 i = 0; i < 255; ++i) {
prevTokenBalance = tokenBalance;
// Use divUpRaw with tokenBalance, as it is a "raw" 36 decimal value.
tokenBalance = ((tokenBalance * tokenBalance) + c).divUpRaw((tokenBalance * 2) + b - invariant);
// We are explicitly checking the magnitudes here, so can use unchecked math.
unchecked {
if (tokenBalance > prevTokenBalance) {
if (tokenBalance - prevTokenBalance <= 1) {
return tokenBalance;
}
} else if (prevTokenBalance - tokenBalance <= 1) {
return tokenBalance;
}
}
}
revert StableComputeBalanceDidNotConverge();
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IERC20Metadata } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Metadata.sol";
import { IERC20Permit } from "@openzeppelin/contracts/token/ERC20/extensions/IERC20Permit.sol";
import { ERC165 } from "@openzeppelin/contracts/utils/introspection/ERC165.sol";
import { EIP712 } from "@openzeppelin/contracts/utils/cryptography/EIP712.sol";
import { ECDSA } from "@openzeppelin/contracts/utils/cryptography/ECDSA.sol";
import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol";
import { Nonces } from "@openzeppelin/contracts/utils/Nonces.sol";
import { IRateProvider } from "@balancer-labs/v3-interfaces/contracts/solidity-utils/helpers/IRateProvider.sol";
import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol";
import { VaultGuard } from "./VaultGuard.sol";
/**
* @notice `BalancerPoolToken` is a fully ERC20-compatible token to be used as the base contract for Balancer Pools,
* with all the data and implementation delegated to the ERC20Multitoken contract.
* @dev Implementation of the ERC-20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[ERC-2612].
*/
contract BalancerPoolToken is IERC20, IERC20Metadata, IERC20Permit, IRateProvider, EIP712, Nonces, ERC165, VaultGuard {
bytes32 public constant PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @notice Operation failed due to an expired permit signature.
* @param deadline The permit deadline that expired
*/
error ERC2612ExpiredSignature(uint256 deadline);
/**
* @notice Operation failed due to a non-matching signature.
* @param signer The address corresponding to the signature provider
* @param owner The address of the owner (expected value of the signature provider)
*/
error ERC2612InvalidSigner(address signer, address owner);
// EIP712 also defines _name.
string private _bptName;
string private _bptSymbol;
constructor(IVault vault_, string memory bptName, string memory bptSymbol) EIP712(bptName, "1") VaultGuard(vault_) {
_bptName = bptName;
_bptSymbol = bptSymbol;
}
/// @inheritdoc IERC20Metadata
function name() external view returns (string memory) {
return _bptName;
}
/// @inheritdoc IERC20Metadata
function symbol() external view returns (string memory) {
return _bptSymbol;
}
/// @inheritdoc IERC20Metadata
function decimals() external pure returns (uint8) {
// Always 18 decimals for BPT.
return 18;
}
/// @inheritdoc IERC20
function totalSupply() public view returns (uint256) {
return _vault.totalSupply(address(this));
}
function getVault() public view returns (IVault) {
return _vault;
}
/// @inheritdoc IERC20
function balanceOf(address account) external view returns (uint256) {
return _vault.balanceOf(address(this), account);
}
/// @inheritdoc IERC20
function transfer(address to, uint256 amount) external returns (bool) {
// Vault will perform the transfer and call emitTransfer to emit the event from this contract.
_vault.transfer(msg.sender, to, amount);
return true;
}
/// @inheritdoc IERC20
function allowance(address owner, address spender) external view returns (uint256) {
return _vault.allowance(address(this), owner, spender);
}
/// @inheritdoc IERC20
function approve(address spender, uint256 amount) external returns (bool) {
// Vault will perform the approval and call emitApproval to emit the event from this contract.
_vault.approve(msg.sender, spender, amount);
return true;
}
/// @inheritdoc IERC20
function transferFrom(address from, address to, uint256 amount) external returns (bool) {
// Vault will perform the transfer and call emitTransfer to emit the event from this contract.
_vault.transferFrom(msg.sender, from, to, amount);
return true;
}
/**
* Accounting is centralized in the MultiToken contract, and the actual transfers and approvals are done there.
* Operations can be initiated from either the token contract or the MultiToken.
*
* To maintain compliance with the ERC-20 standard, and conform to the expectations of off-chain processes,
* the MultiToken calls `emitTransfer` and `emitApproval` during those operations, so that the event is emitted
* only from the token contract. These events are NOT defined in the MultiToken contract.
*/
/// @dev Emit the Transfer event. This function can only be called by the MultiToken.
function emitTransfer(address from, address to, uint256 amount) external onlyVault {
emit Transfer(from, to, amount);
}
/// @dev Emit the Approval event. This function can only be called by the MultiToken.
function emitApproval(address owner, address spender, uint256 amount) external onlyVault {
emit Approval(owner, spender, amount);
}
// @inheritdoc IERC20Permit
function permit(
address owner,
address spender,
uint256 amount,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) public virtual {
// solhint-disable-next-line not-rely-on-time
if (block.timestamp > deadline) {
revert ERC2612ExpiredSignature(deadline);
}
bytes32 structHash = keccak256(abi.encode(PERMIT_TYPEHASH, owner, spender, amount, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
if (signer != owner) {
revert ERC2612InvalidSigner(signer, owner);
}
_vault.approve(owner, spender, amount);
}
// @inheritdoc IERC20Permit
function nonces(address owner) public view virtual override(IERC20Permit, Nonces) returns (uint256) {
return super.nonces(owner);
}
/// @notice Increment the sender's nonce to revoke any currently granted (but not yet executed) `permit`.
function incrementNonce() external {
_useNonce(msg.sender);
}
// @inheritdoc IERC20Permit
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view virtual returns (bytes32) {
return _domainSeparatorV4();
}
/**
* @notice Get the BPT rate, which is defined as: pool invariant/total supply.
* @dev The VaultExtension contract defines a default implementation (`getBptRate`) to calculate the rate
* of any given pool, which should be sufficient in nearly all cases.
*
* @return rate Rate of the pool's BPT
*/
function getRate() public view virtual returns (uint256) {
return getVault().getBptRate(address(this));
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { IVaultErrors } from "@balancer-labs/v3-interfaces/contracts/vault/IVaultErrors.sol";
import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol";
/// @notice Contract that shares the modifier `onlyVault`.
contract VaultGuard {
IVault internal immutable _vault;
constructor(IVault vault) {
_vault = vault;
}
modifier onlyVault() {
_ensureOnlyVault();
_;
}
function _ensureOnlyVault() private view {
if (msg.sender != address(_vault)) {
revert IVaultErrors.SenderIsNotVault(msg.sender);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC4626.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../token/ERC20/IERC20.sol";
import {IERC20Metadata} from "../token/ERC20/extensions/IERC20Metadata.sol";
/**
* @dev Interface of the ERC4626 "Tokenized Vault Standard", as defined in
* https://eips.ethereum.org/EIPS/eip-4626[ERC-4626].
*/
interface IERC4626 is IERC20, IERC20Metadata {
event Deposit(address indexed sender, address indexed owner, uint256 assets, uint256 shares);
event Withdraw(
address indexed sender,
address indexed receiver,
address indexed owner,
uint256 assets,
uint256 shares
);
/**
* @dev Returns the address of the underlying token used for the Vault for accounting, depositing, and withdrawing.
*
* - MUST be an ERC-20 token contract.
* - MUST NOT revert.
*/
function asset() external view returns (address assetTokenAddress);
/**
* @dev Returns the total amount of the underlying asset that is “managed” by Vault.
*
* - SHOULD include any compounding that occurs from yield.
* - MUST be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT revert.
*/
function totalAssets() external view returns (uint256 totalManagedAssets);
/**
* @dev Returns the amount of shares that the Vault would exchange for the amount of assets provided, in an ideal
* scenario where all the conditions are met.
*
* - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT show any variations depending on the caller.
* - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
* - MUST NOT revert.
*
* NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
* “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
* from.
*/
function convertToShares(uint256 assets) external view returns (uint256 shares);
/**
* @dev Returns the amount of assets that the Vault would exchange for the amount of shares provided, in an ideal
* scenario where all the conditions are met.
*
* - MUST NOT be inclusive of any fees that are charged against assets in the Vault.
* - MUST NOT show any variations depending on the caller.
* - MUST NOT reflect slippage or other on-chain conditions, when performing the actual exchange.
* - MUST NOT revert.
*
* NOTE: This calculation MAY NOT reflect the “per-user” price-per-share, and instead should reflect the
* “average-user’s” price-per-share, meaning what the average user should expect to see when exchanging to and
* from.
*/
function convertToAssets(uint256 shares) external view returns (uint256 assets);
/**
* @dev Returns the maximum amount of the underlying asset that can be deposited into the Vault for the receiver,
* through a deposit call.
*
* - MUST return a limited value if receiver is subject to some deposit limit.
* - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of assets that may be deposited.
* - MUST NOT revert.
*/
function maxDeposit(address receiver) external view returns (uint256 maxAssets);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their deposit at the current block, given
* current on-chain conditions.
*
* - MUST return as close to and no more than the exact amount of Vault shares that would be minted in a deposit
* call in the same transaction. I.e. deposit should return the same or more shares as previewDeposit if called
* in the same transaction.
* - MUST NOT account for deposit limits like those returned from maxDeposit and should always act as though the
* deposit would be accepted, regardless if the user has enough tokens approved, etc.
* - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToShares and previewDeposit SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by depositing.
*/
function previewDeposit(uint256 assets) external view returns (uint256 shares);
/**
* @dev Mints shares Vault shares to receiver by depositing exactly amount of underlying tokens.
*
* - MUST emit the Deposit event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* deposit execution, and are accounted for during deposit.
* - MUST revert if all of assets cannot be deposited (due to deposit limit being reached, slippage, the user not
* approving enough underlying tokens to the Vault contract, etc).
*
* NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
*/
function deposit(uint256 assets, address receiver) external returns (uint256 shares);
/**
* @dev Returns the maximum amount of the Vault shares that can be minted for the receiver, through a mint call.
* - MUST return a limited value if receiver is subject to some mint limit.
* - MUST return 2 ** 256 - 1 if there is no limit on the maximum amount of shares that may be minted.
* - MUST NOT revert.
*/
function maxMint(address receiver) external view returns (uint256 maxShares);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their mint at the current block, given
* current on-chain conditions.
*
* - MUST return as close to and no fewer than the exact amount of assets that would be deposited in a mint call
* in the same transaction. I.e. mint should return the same or fewer assets as previewMint if called in the
* same transaction.
* - MUST NOT account for mint limits like those returned from maxMint and should always act as though the mint
* would be accepted, regardless if the user has enough tokens approved, etc.
* - MUST be inclusive of deposit fees. Integrators should be aware of the existence of deposit fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToAssets and previewMint SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by minting.
*/
function previewMint(uint256 shares) external view returns (uint256 assets);
/**
* @dev Mints exactly shares Vault shares to receiver by depositing amount of underlying tokens.
*
* - MUST emit the Deposit event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the mint
* execution, and are accounted for during mint.
* - MUST revert if all of shares cannot be minted (due to deposit limit being reached, slippage, the user not
* approving enough underlying tokens to the Vault contract, etc).
*
* NOTE: most implementations will require pre-approval of the Vault with the Vault’s underlying asset token.
*/
function mint(uint256 shares, address receiver) external returns (uint256 assets);
/**
* @dev Returns the maximum amount of the underlying asset that can be withdrawn from the owner balance in the
* Vault, through a withdraw call.
*
* - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
* - MUST NOT revert.
*/
function maxWithdraw(address owner) external view returns (uint256 maxAssets);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their withdrawal at the current block,
* given current on-chain conditions.
*
* - MUST return as close to and no fewer than the exact amount of Vault shares that would be burned in a withdraw
* call in the same transaction. I.e. withdraw should return the same or fewer shares as previewWithdraw if
* called
* in the same transaction.
* - MUST NOT account for withdrawal limits like those returned from maxWithdraw and should always act as though
* the withdrawal would be accepted, regardless if the user has enough shares, etc.
* - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToShares and previewWithdraw SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by depositing.
*/
function previewWithdraw(uint256 assets) external view returns (uint256 shares);
/**
* @dev Burns shares from owner and sends exactly assets of underlying tokens to receiver.
*
* - MUST emit the Withdraw event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* withdraw execution, and are accounted for during withdraw.
* - MUST revert if all of assets cannot be withdrawn (due to withdrawal limit being reached, slippage, the owner
* not having enough shares, etc).
*
* Note that some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
* Those methods should be performed separately.
*/
function withdraw(uint256 assets, address receiver, address owner) external returns (uint256 shares);
/**
* @dev Returns the maximum amount of Vault shares that can be redeemed from the owner balance in the Vault,
* through a redeem call.
*
* - MUST return a limited value if owner is subject to some withdrawal limit or timelock.
* - MUST return balanceOf(owner) if owner is not subject to any withdrawal limit or timelock.
* - MUST NOT revert.
*/
function maxRedeem(address owner) external view returns (uint256 maxShares);
/**
* @dev Allows an on-chain or off-chain user to simulate the effects of their redeemption at the current block,
* given current on-chain conditions.
*
* - MUST return as close to and no more than the exact amount of assets that would be withdrawn in a redeem call
* in the same transaction. I.e. redeem should return the same or more assets as previewRedeem if called in the
* same transaction.
* - MUST NOT account for redemption limits like those returned from maxRedeem and should always act as though the
* redemption would be accepted, regardless if the user has enough shares, etc.
* - MUST be inclusive of withdrawal fees. Integrators should be aware of the existence of withdrawal fees.
* - MUST NOT revert.
*
* NOTE: any unfavorable discrepancy between convertToAssets and previewRedeem SHOULD be considered slippage in
* share price or some other type of condition, meaning the depositor will lose assets by redeeming.
*/
function previewRedeem(uint256 shares) external view returns (uint256 assets);
/**
* @dev Burns exactly shares from owner and sends assets of underlying tokens to receiver.
*
* - MUST emit the Withdraw event.
* - MAY support an additional flow in which the underlying tokens are owned by the Vault contract before the
* redeem execution, and are accounted for during redeem.
* - MUST revert if all of shares cannot be redeemed (due to withdrawal limit being reached, slippage, the owner
* not having enough shares, etc).
*
* NOTE: some implementations will require pre-requesting to the Vault before a withdrawal may be performed.
* Those methods should be performed separately.
*/
function redeem(uint256 shares, address receiver, address owner) external returns (uint256 assets);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (interfaces/IERC5267.sol)
pragma solidity ^0.8.20;
interface IERC5267 {
/**
* @dev MAY be emitted to signal that the domain could have changed.
*/
event EIP712DomainChanged();
/**
* @dev returns the fields and values that describe the domain separator used by this contract for EIP-712
* signature.
*/
function eip712Domain()
external
view
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Metadata.sol)
pragma solidity ^0.8.20;
import {IERC20} from "../IERC20.sol";
/**
* @dev Interface for the optional metadata functions from the ERC20 standard.
*/
interface IERC20Metadata is IERC20 {
/**
* @dev Returns the name of the token.
*/
function name() external view returns (string memory);
/**
* @dev Returns the symbol of the token.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the decimals places of the token.
*/
function decimals() external view returns (uint8);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/extensions/IERC20Permit.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 Permit extension allowing approvals to be made via signatures, as defined in
* https://eips.ethereum.org/EIPS/eip-2612[EIP-2612].
*
* Adds the {permit} method, which can be used to change an account's ERC20 allowance (see {IERC20-allowance}) by
* presenting a message signed by the account. By not relying on {IERC20-approve}, the token holder account doesn't
* need to send a transaction, and thus is not required to hold Ether at all.
*
* ==== Security Considerations
*
* There are two important considerations concerning the use of `permit`. The first is that a valid permit signature
* expresses an allowance, and it should not be assumed to convey additional meaning. In particular, it should not be
* considered as an intention to spend the allowance in any specific way. The second is that because permits have
* built-in replay protection and can be submitted by anyone, they can be frontrun. A protocol that uses permits should
* take this into consideration and allow a `permit` call to fail. Combining these two aspects, a pattern that may be
* generally recommended is:
*
* ```solidity
* function doThingWithPermit(..., uint256 value, uint256 deadline, uint8 v, bytes32 r, bytes32 s) public {
* try token.permit(msg.sender, address(this), value, deadline, v, r, s) {} catch {}
* doThing(..., value);
* }
*
* function doThing(..., uint256 value) public {
* token.safeTransferFrom(msg.sender, address(this), value);
* ...
* }
* ```
*
* Observe that: 1) `msg.sender` is used as the owner, leaving no ambiguity as to the signer intent, and 2) the use of
* `try/catch` allows the permit to fail and makes the code tolerant to frontrunning. (See also
* {SafeERC20-safeTransferFrom}).
*
* Additionally, note that smart contract wallets (such as Argent or Safe) are not able to produce permit signatures, so
* contracts should have entry points that don't rely on permit.
*/
interface IERC20Permit {
/**
* @dev Sets `value` as the allowance of `spender` over ``owner``'s tokens,
* given ``owner``'s signed approval.
*
* IMPORTANT: The same issues {IERC20-approve} has related to transaction
* ordering also apply here.
*
* Emits an {Approval} event.
*
* Requirements:
*
* - `spender` cannot be the zero address.
* - `deadline` must be a timestamp in the future.
* - `v`, `r` and `s` must be a valid `secp256k1` signature from `owner`
* over the EIP712-formatted function arguments.
* - the signature must use ``owner``'s current nonce (see {nonces}).
*
* For more information on the signature format, see the
* https://eips.ethereum.org/EIPS/eip-2612#specification[relevant EIP
* section].
*
* CAUTION: See Security Considerations above.
*/
function permit(
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) external;
/**
* @dev Returns the current nonce for `owner`. This value must be
* included whenever a signature is generated for {permit}.
*
* Every successful call to {permit} increases ``owner``'s nonce by one. This
* prevents a signature from being used multiple times.
*/
function nonces(address owner) external view returns (uint256);
/**
* @dev Returns the domain separator used in the encoding of the signature for {permit}, as defined by {EIP712}.
*/
// solhint-disable-next-line func-name-mixedcase
function DOMAIN_SEPARATOR() external view returns (bytes32);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (token/ERC20/IERC20.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC20 standard as defined in the EIP.
*/
interface IERC20 {
/**
* @dev Emitted when `value` tokens are moved from one account (`from`) to
* another (`to`).
*
* Note that `value` may be zero.
*/
event Transfer(address indexed from, address indexed to, uint256 value);
/**
* @dev Emitted when the allowance of a `spender` for an `owner` is set by
* a call to {approve}. `value` is the new allowance.
*/
event Approval(address indexed owner, address indexed spender, uint256 value);
/**
* @dev Returns the value of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the value of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves a `value` amount of tokens from the caller's account to `to`.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transfer(address to, uint256 value) external returns (bool);
/**
* @dev Returns the remaining number of tokens that `spender` will be
* allowed to spend on behalf of `owner` through {transferFrom}. This is
* zero by default.
*
* This value changes when {approve} or {transferFrom} are called.
*/
function allowance(address owner, address spender) external view returns (uint256);
/**
* @dev Sets a `value` amount of tokens as the allowance of `spender` over the
* caller's tokens.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* IMPORTANT: Beware that changing an allowance with this method brings the risk
* that someone may use both the old and the new allowance by unfortunate
* transaction ordering. One possible solution to mitigate this race
* condition is to first reduce the spender's allowance to 0 and set the
* desired value afterwards:
* https://github.com/ethereum/EIPs/issues/20#issuecomment-263524729
*
* Emits an {Approval} event.
*/
function approve(address spender, uint256 value) external returns (bool);
/**
* @dev Moves a `value` amount of tokens from `from` to `to` using the
* allowance mechanism. `value` is then deducted from the caller's
* allowance.
*
* Returns a boolean value indicating whether the operation succeeded.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 value) external returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/ECDSA.sol)
pragma solidity ^0.8.20;
/**
* @dev Elliptic Curve Digital Signature Algorithm (ECDSA) operations.
*
* These functions can be used to verify that a message was signed by the holder
* of the private keys of a given address.
*/
library ECDSA {
enum RecoverError {
NoError,
InvalidSignature,
InvalidSignatureLength,
InvalidSignatureS
}
/**
* @dev The signature derives the `address(0)`.
*/
error ECDSAInvalidSignature();
/**
* @dev The signature has an invalid length.
*/
error ECDSAInvalidSignatureLength(uint256 length);
/**
* @dev The signature has an S value that is in the upper half order.
*/
error ECDSAInvalidSignatureS(bytes32 s);
/**
* @dev Returns the address that signed a hashed message (`hash`) with `signature` or an error. This will not
* return address(0) without also returning an error description. Errors are documented using an enum (error type)
* and a bytes32 providing additional information about the error.
*
* If no error is returned, then the address can be used for verification purposes.
*
* The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
*
* Documentation for signature generation:
* - with https://web3js.readthedocs.io/en/v1.3.4/web3-eth-accounts.html#sign[Web3.js]
* - with https://docs.ethers.io/v5/api/signer/#Signer-signMessage[ethers]
*/
function tryRecover(bytes32 hash, bytes memory signature) internal pure returns (address, RecoverError, bytes32) {
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength, bytes32(signature.length));
}
}
/**
* @dev Returns the address that signed a hashed message (`hash`) with
* `signature`. This address can then be used for verification purposes.
*
* The `ecrecover` EVM precompile allows for malleable (non-unique) signatures:
* this function rejects them by requiring the `s` value to be in the lower
* half order, and the `v` value to be either 27 or 28.
*
* IMPORTANT: `hash` _must_ be the result of a hash operation for the
* verification to be secure: it is possible to craft signatures that
* recover to arbitrary addresses for non-hashed data. A safe way to ensure
* this is by receiving a hash of the original message (which may otherwise
* be too long), and then calling {MessageHashUtils-toEthSignedMessageHash} on it.
*/
function recover(bytes32 hash, bytes memory signature) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, signature);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `r` and `vs` short-signature fields separately.
*
* See https://eips.ethereum.org/EIPS/eip-2098[EIP-2098 short signatures]
*/
function tryRecover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address, RecoverError, bytes32) {
unchecked {
bytes32 s = vs & bytes32(0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff);
// We do not check for an overflow here since the shift operation results in 0 or 1.
uint8 v = uint8((uint256(vs) >> 255) + 27);
return tryRecover(hash, v, r, s);
}
}
/**
* @dev Overload of {ECDSA-recover} that receives the `r and `vs` short-signature fields separately.
*/
function recover(bytes32 hash, bytes32 r, bytes32 vs) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, r, vs);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Overload of {ECDSA-tryRecover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function tryRecover(
bytes32 hash,
uint8 v,
bytes32 r,
bytes32 s
) internal pure returns (address, RecoverError, bytes32) {
// EIP-2 still allows signature malleability for ecrecover(). Remove this possibility and make the signature
// unique. Appendix F in the Ethereum Yellow paper (https://ethereum.github.io/yellowpaper/paper.pdf), defines
// the valid range for s in (301): 0 < s < secp256k1n ÷ 2 + 1, and for v in (302): v ∈ {27, 28}. Most
// signatures from current libraries generate a unique signature with an s-value in the lower half order.
//
// If your library generates malleable signatures, such as s-values in the upper range, calculate a new s-value
// with 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFEBAAEDCE6AF48A03BBFD25E8CD0364141 - s1 and flip v from 27 to 28 or
// vice versa. If your library also generates signatures with 0/1 for v instead 27/28, add 27 to v to accept
// these malleable signatures as well.
if (uint256(s) > 0x7FFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF5D576E7357A4501DDFE92F46681B20A0) {
return (address(0), RecoverError.InvalidSignatureS, s);
}
// If the signature is valid (and not malleable), return the signer address
address signer = ecrecover(hash, v, r, s);
if (signer == address(0)) {
return (address(0), RecoverError.InvalidSignature, bytes32(0));
}
return (signer, RecoverError.NoError, bytes32(0));
}
/**
* @dev Overload of {ECDSA-recover} that receives the `v`,
* `r` and `s` signature fields separately.
*/
function recover(bytes32 hash, uint8 v, bytes32 r, bytes32 s) internal pure returns (address) {
(address recovered, RecoverError error, bytes32 errorArg) = tryRecover(hash, v, r, s);
_throwError(error, errorArg);
return recovered;
}
/**
* @dev Optionally reverts with the corresponding custom error according to the `error` argument provided.
*/
function _throwError(RecoverError error, bytes32 errorArg) private pure {
if (error == RecoverError.NoError) {
return; // no error: do nothing
} else if (error == RecoverError.InvalidSignature) {
revert ECDSAInvalidSignature();
} else if (error == RecoverError.InvalidSignatureLength) {
revert ECDSAInvalidSignatureLength(uint256(errorArg));
} else if (error == RecoverError.InvalidSignatureS) {
revert ECDSAInvalidSignatureS(errorArg);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/EIP712.sol)
pragma solidity ^0.8.20;
import {MessageHashUtils} from "./MessageHashUtils.sol";
import {ShortStrings, ShortString} from "../ShortStrings.sol";
import {IERC5267} from "../../interfaces/IERC5267.sol";
/**
* @dev https://eips.ethereum.org/EIPS/eip-712[EIP 712] is a standard for hashing and signing of typed structured data.
*
* The encoding scheme specified in the EIP requires a domain separator and a hash of the typed structured data, whose
* encoding is very generic and therefore its implementation in Solidity is not feasible, thus this contract
* does not implement the encoding itself. Protocols need to implement the type-specific encoding they need in order to
* produce the hash of their typed data using a combination of `abi.encode` and `keccak256`.
*
* This contract implements the EIP 712 domain separator ({_domainSeparatorV4}) that is used as part of the encoding
* scheme, and the final step of the encoding to obtain the message digest that is then signed via ECDSA
* ({_hashTypedDataV4}).
*
* The implementation of the domain separator was designed to be as efficient as possible while still properly updating
* the chain id to protect against replay attacks on an eventual fork of the chain.
*
* NOTE: This contract implements the version of the encoding known as "v4", as implemented by the JSON RPC method
* https://docs.metamask.io/guide/signing-data.html[`eth_signTypedDataV4` in MetaMask].
*
* NOTE: In the upgradeable version of this contract, the cached values will correspond to the address, and the domain
* separator of the implementation contract. This will cause the {_domainSeparatorV4} function to always rebuild the
* separator from the immutable values, which is cheaper than accessing a cached version in cold storage.
*
* @custom:oz-upgrades-unsafe-allow state-variable-immutable
*/
abstract contract EIP712 is IERC5267 {
using ShortStrings for *;
bytes32 private constant TYPE_HASH =
keccak256("EIP712Domain(string name,string version,uint256 chainId,address verifyingContract)");
// Cache the domain separator as an immutable value, but also store the chain id that it corresponds to, in order to
// invalidate the cached domain separator if the chain id changes.
bytes32 private immutable _cachedDomainSeparator;
uint256 private immutable _cachedChainId;
address private immutable _cachedThis;
bytes32 private immutable _hashedName;
bytes32 private immutable _hashedVersion;
ShortString private immutable _name;
ShortString private immutable _version;
string private _nameFallback;
string private _versionFallback;
/**
* @dev Initializes the domain separator and parameter caches.
*
* The meaning of `name` and `version` is specified in
* https://eips.ethereum.org/EIPS/eip-712#definition-of-domainseparator[EIP 712]:
*
* - `name`: the user readable name of the signing domain, i.e. the name of the DApp or the protocol.
* - `version`: the current major version of the signing domain.
*
* NOTE: These parameters cannot be changed except through a xref:learn::upgrading-smart-contracts.adoc[smart
* contract upgrade].
*/
constructor(string memory name, string memory version) {
_name = name.toShortStringWithFallback(_nameFallback);
_version = version.toShortStringWithFallback(_versionFallback);
_hashedName = keccak256(bytes(name));
_hashedVersion = keccak256(bytes(version));
_cachedChainId = block.chainid;
_cachedDomainSeparator = _buildDomainSeparator();
_cachedThis = address(this);
}
/**
* @dev Returns the domain separator for the current chain.
*/
function _domainSeparatorV4() internal view returns (bytes32) {
if (address(this) == _cachedThis && block.chainid == _cachedChainId) {
return _cachedDomainSeparator;
} else {
return _buildDomainSeparator();
}
}
function _buildDomainSeparator() private view returns (bytes32) {
return keccak256(abi.encode(TYPE_HASH, _hashedName, _hashedVersion, block.chainid, address(this)));
}
/**
* @dev Given an already https://eips.ethereum.org/EIPS/eip-712#definition-of-hashstruct[hashed struct], this
* function returns the hash of the fully encoded EIP712 message for this domain.
*
* This hash can be used together with {ECDSA-recover} to obtain the signer of a message. For example:
*
* ```solidity
* bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(
* keccak256("Mail(address to,string contents)"),
* mailTo,
* keccak256(bytes(mailContents))
* )));
* address signer = ECDSA.recover(digest, signature);
* ```
*/
function _hashTypedDataV4(bytes32 structHash) internal view virtual returns (bytes32) {
return MessageHashUtils.toTypedDataHash(_domainSeparatorV4(), structHash);
}
/**
* @dev See {IERC-5267}.
*/
function eip712Domain()
public
view
virtual
returns (
bytes1 fields,
string memory name,
string memory version,
uint256 chainId,
address verifyingContract,
bytes32 salt,
uint256[] memory extensions
)
{
return (
hex"0f", // 01111
_EIP712Name(),
_EIP712Version(),
block.chainid,
address(this),
bytes32(0),
new uint256[](0)
);
}
/**
* @dev The name parameter for the EIP712 domain.
*
* NOTE: By default this function reads _name which is an immutable value.
* It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
*/
// solhint-disable-next-line func-name-mixedcase
function _EIP712Name() internal view returns (string memory) {
return _name.toStringWithFallback(_nameFallback);
}
/**
* @dev The version parameter for the EIP712 domain.
*
* NOTE: By default this function reads _version which is an immutable value.
* It only reads from storage if necessary (in case the value is too large to fit in a ShortString).
*/
// solhint-disable-next-line func-name-mixedcase
function _EIP712Version() internal view returns (string memory) {
return _version.toStringWithFallback(_versionFallback);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/cryptography/MessageHashUtils.sol)
pragma solidity ^0.8.20;
import {Strings} from "../Strings.sol";
/**
* @dev Signature message hash utilities for producing digests to be consumed by {ECDSA} recovery or signing.
*
* The library provides methods for generating a hash of a message that conforms to the
* https://eips.ethereum.org/EIPS/eip-191[EIP 191] and https://eips.ethereum.org/EIPS/eip-712[EIP 712]
* specifications.
*/
library MessageHashUtils {
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x45` (`personal_sign` messages).
*
* The digest is calculated by prefixing a bytes32 `messageHash` with
* `"\x19Ethereum Signed Message:\n32"` and hashing the result. It corresponds with the
* hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
*
* NOTE: The `messageHash` parameter is intended to be the result of hashing a raw message with
* keccak256, although any bytes32 value can be safely used because the final digest will
* be re-hashed.
*
* See {ECDSA-recover}.
*/
function toEthSignedMessageHash(bytes32 messageHash) internal pure returns (bytes32 digest) {
/// @solidity memory-safe-assembly
assembly {
mstore(0x00, "\x19Ethereum Signed Message:\n32") // 32 is the bytes-length of messageHash
mstore(0x1c, messageHash) // 0x1c (28) is the length of the prefix
digest := keccak256(0x00, 0x3c) // 0x3c is the length of the prefix (0x1c) + messageHash (0x20)
}
}
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x45` (`personal_sign` messages).
*
* The digest is calculated by prefixing an arbitrary `message` with
* `"\x19Ethereum Signed Message:\n" + len(message)` and hashing the result. It corresponds with the
* hash signed when using the https://eth.wiki/json-rpc/API#eth_sign[`eth_sign`] JSON-RPC method.
*
* See {ECDSA-recover}.
*/
function toEthSignedMessageHash(bytes memory message) internal pure returns (bytes32) {
return
keccak256(bytes.concat("\x19Ethereum Signed Message:\n", bytes(Strings.toString(message.length)), message));
}
/**
* @dev Returns the keccak256 digest of an EIP-191 signed data with version
* `0x00` (data with intended validator).
*
* The digest is calculated by prefixing an arbitrary `data` with `"\x19\x00"` and the intended
* `validator` address. Then hashing the result.
*
* See {ECDSA-recover}.
*/
function toDataWithIntendedValidatorHash(address validator, bytes memory data) internal pure returns (bytes32) {
return keccak256(abi.encodePacked(hex"19_00", validator, data));
}
/**
* @dev Returns the keccak256 digest of an EIP-712 typed data (EIP-191 version `0x01`).
*
* The digest is calculated from a `domainSeparator` and a `structHash`, by prefixing them with
* `\x19\x01` and hashing the result. It corresponds to the hash signed by the
* https://eips.ethereum.org/EIPS/eip-712[`eth_signTypedData`] JSON-RPC method as part of EIP-712.
*
* See {ECDSA-recover}.
*/
function toTypedDataHash(bytes32 domainSeparator, bytes32 structHash) internal pure returns (bytes32 digest) {
/// @solidity memory-safe-assembly
assembly {
let ptr := mload(0x40)
mstore(ptr, hex"19_01")
mstore(add(ptr, 0x02), domainSeparator)
mstore(add(ptr, 0x22), structHash)
digest := keccak256(ptr, 0x42)
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/ERC165.sol)
pragma solidity ^0.8.20;
import {IERC165} from "./IERC165.sol";
/**
* @dev Implementation of the {IERC165} interface.
*
* Contracts that want to implement ERC165 should inherit from this contract and override {supportsInterface} to check
* for the additional interface id that will be supported. For example:
*
* ```solidity
* function supportsInterface(bytes4 interfaceId) public view virtual override returns (bool) {
* return interfaceId == type(MyInterface).interfaceId || super.supportsInterface(interfaceId);
* }
* ```
*/
abstract contract ERC165 is IERC165 {
/**
* @dev See {IERC165-supportsInterface}.
*/
function supportsInterface(bytes4 interfaceId) public view virtual returns (bool) {
return interfaceId == type(IERC165).interfaceId;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/introspection/IERC165.sol)
pragma solidity ^0.8.20;
/**
* @dev Interface of the ERC165 standard, as defined in the
* https://eips.ethereum.org/EIPS/eip-165[EIP].
*
* Implementers can declare support of contract interfaces, which can then be
* queried by others ({ERC165Checker}).
*
* For an implementation, see {ERC165}.
*/
interface IERC165 {
/**
* @dev Returns true if this contract implements the interface defined by
* `interfaceId`. See the corresponding
* https://eips.ethereum.org/EIPS/eip-165#how-interfaces-are-identified[EIP section]
* to learn more about how these ids are created.
*
* This function call must use less than 30 000 gas.
*/
function supportsInterface(bytes4 interfaceId) external view returns (bool);
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/Math.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
/**
* @dev Muldiv operation overflow.
*/
error MathOverflowedMulDiv();
enum Rounding {
Floor, // Toward negative infinity
Ceil, // Toward positive infinity
Trunc, // Toward zero
Expand // Away from zero
}
/**
* @dev Returns the addition of two unsigned integers, with an overflow flag.
*/
function tryAdd(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
uint256 c = a + b;
if (c < a) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the subtraction of two unsigned integers, with an overflow flag.
*/
function trySub(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b > a) return (false, 0);
return (true, a - b);
}
}
/**
* @dev Returns the multiplication of two unsigned integers, with an overflow flag.
*/
function tryMul(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
// Gas optimization: this is cheaper than requiring 'a' not being zero, but the
// benefit is lost if 'b' is also tested.
// See: https://github.com/OpenZeppelin/openzeppelin-contracts/pull/522
if (a == 0) return (true, 0);
uint256 c = a * b;
if (c / a != b) return (false, 0);
return (true, c);
}
}
/**
* @dev Returns the division of two unsigned integers, with a division by zero flag.
*/
function tryDiv(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a / b);
}
}
/**
* @dev Returns the remainder of dividing two unsigned integers, with a division by zero flag.
*/
function tryMod(uint256 a, uint256 b) internal pure returns (bool, uint256) {
unchecked {
if (b == 0) return (false, 0);
return (true, a % b);
}
}
/**
* @dev Returns the largest of two numbers.
*/
function max(uint256 a, uint256 b) internal pure returns (uint256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two numbers.
*/
function min(uint256 a, uint256 b) internal pure returns (uint256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two numbers. The result is rounded towards
* zero.
*/
function average(uint256 a, uint256 b) internal pure returns (uint256) {
// (a + b) / 2 can overflow.
return (a & b) + (a ^ b) / 2;
}
/**
* @dev Returns the ceiling of the division of two numbers.
*
* This differs from standard division with `/` in that it rounds towards infinity instead
* of rounding towards zero.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
if (b == 0) {
// Guarantee the same behavior as in a regular Solidity division.
return a / b;
}
// (a + b - 1) / b can overflow on addition, so we distribute.
return a == 0 ? 0 : (a - 1) / b + 1;
}
/**
* @notice Calculates floor(x * y / denominator) with full precision. Throws if result overflows a uint256 or
* denominator == 0.
* @dev Original credit to Remco Bloemen under MIT license (https://xn--2-umb.com/21/muldiv) with further edits by
* Uniswap Labs also under MIT license.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator) internal pure returns (uint256 result) {
unchecked {
// 512-bit multiply [prod1 prod0] = x * y. Compute the product mod 2^256 and mod 2^256 - 1, then use
// use the Chinese Remainder Theorem to reconstruct the 512 bit result. The result is stored in two 256
// variables such that product = prod1 * 2^256 + prod0.
uint256 prod0 = x * y; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
// Solidity will revert if denominator == 0, unlike the div opcode on its own.
// The surrounding unchecked block does not change this fact.
// See https://docs.soliditylang.org/en/latest/control-structures.html#checked-or-unchecked-arithmetic.
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
if (denominator <= prod1) {
revert MathOverflowedMulDiv();
}
///////////////////////////////////////////////
// 512 by 256 division.
///////////////////////////////////////////////
// Make division exact by subtracting the remainder from [prod1 prod0].
uint256 remainder;
assembly {
// Compute remainder using mulmod.
remainder := mulmod(x, y, denominator)
// Subtract 256 bit number from 512 bit number.
prod1 := sub(prod1, gt(remainder, prod0))
prod0 := sub(prod0, remainder)
}
// Factor powers of two out of denominator and compute largest power of two divisor of denominator.
// Always >= 1. See https://cs.stackexchange.com/q/138556/92363.
uint256 twos = denominator & (0 - denominator);
assembly {
// Divide denominator by twos.
denominator := div(denominator, twos)
// Divide [prod1 prod0] by twos.
prod0 := div(prod0, twos)
// Flip twos such that it is 2^256 / twos. If twos is zero, then it becomes one.
twos := add(div(sub(0, twos), twos), 1)
}
// Shift in bits from prod1 into prod0.
prod0 |= prod1 * twos;
// Invert denominator mod 2^256. Now that denominator is an odd number, it has an inverse modulo 2^256 such
// that denominator * inv = 1 mod 2^256. Compute the inverse by starting with a seed that is correct for
// four bits. That is, denominator * inv = 1 mod 2^4.
uint256 inverse = (3 * denominator) ^ 2;
// Use the Newton-Raphson iteration to improve the precision. Thanks to Hensel's lifting lemma, this also
// works in modular arithmetic, doubling the correct bits in each step.
inverse *= 2 - denominator * inverse; // inverse mod 2^8
inverse *= 2 - denominator * inverse; // inverse mod 2^16
inverse *= 2 - denominator * inverse; // inverse mod 2^32
inverse *= 2 - denominator * inverse; // inverse mod 2^64
inverse *= 2 - denominator * inverse; // inverse mod 2^128
inverse *= 2 - denominator * inverse; // inverse mod 2^256
// Because the division is now exact we can divide by multiplying with the modular inverse of denominator.
// This will give us the correct result modulo 2^256. Since the preconditions guarantee that the outcome is
// less than 2^256, this is the final result. We don't need to compute the high bits of the result and prod1
// is no longer required.
result = prod0 * inverse;
return result;
}
}
/**
* @notice Calculates x * y / denominator with full precision, following the selected rounding direction.
*/
function mulDiv(uint256 x, uint256 y, uint256 denominator, Rounding rounding) internal pure returns (uint256) {
uint256 result = mulDiv(x, y, denominator);
if (unsignedRoundsUp(rounding) && mulmod(x, y, denominator) > 0) {
result += 1;
}
return result;
}
/**
* @dev Returns the square root of a number. If the number is not a perfect square, the value is rounded
* towards zero.
*
* Inspired by Henry S. Warren, Jr.'s "Hacker's Delight" (Chapter 11).
*/
function sqrt(uint256 a) internal pure returns (uint256) {
if (a == 0) {
return 0;
}
// For our first guess, we get the biggest power of 2 which is smaller than the square root of the target.
//
// We know that the "msb" (most significant bit) of our target number `a` is a power of 2 such that we have
// `msb(a) <= a < 2*msb(a)`. This value can be written `msb(a)=2**k` with `k=log2(a)`.
//
// This can be rewritten `2**log2(a) <= a < 2**(log2(a) + 1)`
// → `sqrt(2**k) <= sqrt(a) < sqrt(2**(k+1))`
// → `2**(k/2) <= sqrt(a) < 2**((k+1)/2) <= 2**(k/2 + 1)`
//
// Consequently, `2**(log2(a) / 2)` is a good first approximation of `sqrt(a)` with at least 1 correct bit.
uint256 result = 1 << (log2(a) >> 1);
// At this point `result` is an estimation with one bit of precision. We know the true value is a uint128,
// since it is the square root of a uint256. Newton's method converges quadratically (precision doubles at
// every iteration). We thus need at most 7 iteration to turn our partial result with one bit of precision
// into the expected uint128 result.
unchecked {
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
result = (result + a / result) >> 1;
return min(result, a / result);
}
}
/**
* @notice Calculates sqrt(a), following the selected rounding direction.
*/
function sqrt(uint256 a, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = sqrt(a);
return result + (unsignedRoundsUp(rounding) && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log2(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 128;
}
if (value >> 64 > 0) {
value >>= 64;
result += 64;
}
if (value >> 32 > 0) {
value >>= 32;
result += 32;
}
if (value >> 16 > 0) {
value >>= 16;
result += 16;
}
if (value >> 8 > 0) {
value >>= 8;
result += 8;
}
if (value >> 4 > 0) {
value >>= 4;
result += 4;
}
if (value >> 2 > 0) {
value >>= 2;
result += 2;
}
if (value >> 1 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 2, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log2(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log2(value);
return result + (unsignedRoundsUp(rounding) && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10 of a positive value rounded towards zero.
* Returns 0 if given 0.
*/
function log10(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >= 10 ** 64) {
value /= 10 ** 64;
result += 64;
}
if (value >= 10 ** 32) {
value /= 10 ** 32;
result += 32;
}
if (value >= 10 ** 16) {
value /= 10 ** 16;
result += 16;
}
if (value >= 10 ** 8) {
value /= 10 ** 8;
result += 8;
}
if (value >= 10 ** 4) {
value /= 10 ** 4;
result += 4;
}
if (value >= 10 ** 2) {
value /= 10 ** 2;
result += 2;
}
if (value >= 10 ** 1) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 10, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log10(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log10(value);
return result + (unsignedRoundsUp(rounding) && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256 of a positive value rounded towards zero.
* Returns 0 if given 0.
*
* Adding one to the result gives the number of pairs of hex symbols needed to represent `value` as a hex string.
*/
function log256(uint256 value) internal pure returns (uint256) {
uint256 result = 0;
unchecked {
if (value >> 128 > 0) {
value >>= 128;
result += 16;
}
if (value >> 64 > 0) {
value >>= 64;
result += 8;
}
if (value >> 32 > 0) {
value >>= 32;
result += 4;
}
if (value >> 16 > 0) {
value >>= 16;
result += 2;
}
if (value >> 8 > 0) {
result += 1;
}
}
return result;
}
/**
* @dev Return the log in base 256, following the selected rounding direction, of a positive value.
* Returns 0 if given 0.
*/
function log256(uint256 value, Rounding rounding) internal pure returns (uint256) {
unchecked {
uint256 result = log256(value);
return result + (unsignedRoundsUp(rounding) && 1 << (result << 3) < value ? 1 : 0);
}
}
/**
* @dev Returns whether a provided rounding mode is considered rounding up for unsigned integers.
*/
function unsignedRoundsUp(Rounding rounding) internal pure returns (bool) {
return uint8(rounding) % 2 == 1;
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SafeCast.sol)
// This file was procedurally generated from scripts/generate/templates/SafeCast.js.
pragma solidity ^0.8.20;
/**
* @dev Wrappers over Solidity's uintXX/intXX casting operators with added overflow
* checks.
*
* Downcasting from uint256/int256 in Solidity does not revert on overflow. This can
* easily result in undesired exploitation or bugs, since developers usually
* assume that overflows raise errors. `SafeCast` restores this intuition by
* reverting the transaction when such an operation overflows.
*
* Using this library instead of the unchecked operations eliminates an entire
* class of bugs, so it's recommended to use it always.
*/
library SafeCast {
/**
* @dev Value doesn't fit in an uint of `bits` size.
*/
error SafeCastOverflowedUintDowncast(uint8 bits, uint256 value);
/**
* @dev An int value doesn't fit in an uint of `bits` size.
*/
error SafeCastOverflowedIntToUint(int256 value);
/**
* @dev Value doesn't fit in an int of `bits` size.
*/
error SafeCastOverflowedIntDowncast(uint8 bits, int256 value);
/**
* @dev An uint value doesn't fit in an int of `bits` size.
*/
error SafeCastOverflowedUintToInt(uint256 value);
/**
* @dev Returns the downcasted uint248 from uint256, reverting on
* overflow (when the input is greater than largest uint248).
*
* Counterpart to Solidity's `uint248` operator.
*
* Requirements:
*
* - input must fit into 248 bits
*/
function toUint248(uint256 value) internal pure returns (uint248) {
if (value > type(uint248).max) {
revert SafeCastOverflowedUintDowncast(248, value);
}
return uint248(value);
}
/**
* @dev Returns the downcasted uint240 from uint256, reverting on
* overflow (when the input is greater than largest uint240).
*
* Counterpart to Solidity's `uint240` operator.
*
* Requirements:
*
* - input must fit into 240 bits
*/
function toUint240(uint256 value) internal pure returns (uint240) {
if (value > type(uint240).max) {
revert SafeCastOverflowedUintDowncast(240, value);
}
return uint240(value);
}
/**
* @dev Returns the downcasted uint232 from uint256, reverting on
* overflow (when the input is greater than largest uint232).
*
* Counterpart to Solidity's `uint232` operator.
*
* Requirements:
*
* - input must fit into 232 bits
*/
function toUint232(uint256 value) internal pure returns (uint232) {
if (value > type(uint232).max) {
revert SafeCastOverflowedUintDowncast(232, value);
}
return uint232(value);
}
/**
* @dev Returns the downcasted uint224 from uint256, reverting on
* overflow (when the input is greater than largest uint224).
*
* Counterpart to Solidity's `uint224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toUint224(uint256 value) internal pure returns (uint224) {
if (value > type(uint224).max) {
revert SafeCastOverflowedUintDowncast(224, value);
}
return uint224(value);
}
/**
* @dev Returns the downcasted uint216 from uint256, reverting on
* overflow (when the input is greater than largest uint216).
*
* Counterpart to Solidity's `uint216` operator.
*
* Requirements:
*
* - input must fit into 216 bits
*/
function toUint216(uint256 value) internal pure returns (uint216) {
if (value > type(uint216).max) {
revert SafeCastOverflowedUintDowncast(216, value);
}
return uint216(value);
}
/**
* @dev Returns the downcasted uint208 from uint256, reverting on
* overflow (when the input is greater than largest uint208).
*
* Counterpart to Solidity's `uint208` operator.
*
* Requirements:
*
* - input must fit into 208 bits
*/
function toUint208(uint256 value) internal pure returns (uint208) {
if (value > type(uint208).max) {
revert SafeCastOverflowedUintDowncast(208, value);
}
return uint208(value);
}
/**
* @dev Returns the downcasted uint200 from uint256, reverting on
* overflow (when the input is greater than largest uint200).
*
* Counterpart to Solidity's `uint200` operator.
*
* Requirements:
*
* - input must fit into 200 bits
*/
function toUint200(uint256 value) internal pure returns (uint200) {
if (value > type(uint200).max) {
revert SafeCastOverflowedUintDowncast(200, value);
}
return uint200(value);
}
/**
* @dev Returns the downcasted uint192 from uint256, reverting on
* overflow (when the input is greater than largest uint192).
*
* Counterpart to Solidity's `uint192` operator.
*
* Requirements:
*
* - input must fit into 192 bits
*/
function toUint192(uint256 value) internal pure returns (uint192) {
if (value > type(uint192).max) {
revert SafeCastOverflowedUintDowncast(192, value);
}
return uint192(value);
}
/**
* @dev Returns the downcasted uint184 from uint256, reverting on
* overflow (when the input is greater than largest uint184).
*
* Counterpart to Solidity's `uint184` operator.
*
* Requirements:
*
* - input must fit into 184 bits
*/
function toUint184(uint256 value) internal pure returns (uint184) {
if (value > type(uint184).max) {
revert SafeCastOverflowedUintDowncast(184, value);
}
return uint184(value);
}
/**
* @dev Returns the downcasted uint176 from uint256, reverting on
* overflow (when the input is greater than largest uint176).
*
* Counterpart to Solidity's `uint176` operator.
*
* Requirements:
*
* - input must fit into 176 bits
*/
function toUint176(uint256 value) internal pure returns (uint176) {
if (value > type(uint176).max) {
revert SafeCastOverflowedUintDowncast(176, value);
}
return uint176(value);
}
/**
* @dev Returns the downcasted uint168 from uint256, reverting on
* overflow (when the input is greater than largest uint168).
*
* Counterpart to Solidity's `uint168` operator.
*
* Requirements:
*
* - input must fit into 168 bits
*/
function toUint168(uint256 value) internal pure returns (uint168) {
if (value > type(uint168).max) {
revert SafeCastOverflowedUintDowncast(168, value);
}
return uint168(value);
}
/**
* @dev Returns the downcasted uint160 from uint256, reverting on
* overflow (when the input is greater than largest uint160).
*
* Counterpart to Solidity's `uint160` operator.
*
* Requirements:
*
* - input must fit into 160 bits
*/
function toUint160(uint256 value) internal pure returns (uint160) {
if (value > type(uint160).max) {
revert SafeCastOverflowedUintDowncast(160, value);
}
return uint160(value);
}
/**
* @dev Returns the downcasted uint152 from uint256, reverting on
* overflow (when the input is greater than largest uint152).
*
* Counterpart to Solidity's `uint152` operator.
*
* Requirements:
*
* - input must fit into 152 bits
*/
function toUint152(uint256 value) internal pure returns (uint152) {
if (value > type(uint152).max) {
revert SafeCastOverflowedUintDowncast(152, value);
}
return uint152(value);
}
/**
* @dev Returns the downcasted uint144 from uint256, reverting on
* overflow (when the input is greater than largest uint144).
*
* Counterpart to Solidity's `uint144` operator.
*
* Requirements:
*
* - input must fit into 144 bits
*/
function toUint144(uint256 value) internal pure returns (uint144) {
if (value > type(uint144).max) {
revert SafeCastOverflowedUintDowncast(144, value);
}
return uint144(value);
}
/**
* @dev Returns the downcasted uint136 from uint256, reverting on
* overflow (when the input is greater than largest uint136).
*
* Counterpart to Solidity's `uint136` operator.
*
* Requirements:
*
* - input must fit into 136 bits
*/
function toUint136(uint256 value) internal pure returns (uint136) {
if (value > type(uint136).max) {
revert SafeCastOverflowedUintDowncast(136, value);
}
return uint136(value);
}
/**
* @dev Returns the downcasted uint128 from uint256, reverting on
* overflow (when the input is greater than largest uint128).
*
* Counterpart to Solidity's `uint128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toUint128(uint256 value) internal pure returns (uint128) {
if (value > type(uint128).max) {
revert SafeCastOverflowedUintDowncast(128, value);
}
return uint128(value);
}
/**
* @dev Returns the downcasted uint120 from uint256, reverting on
* overflow (when the input is greater than largest uint120).
*
* Counterpart to Solidity's `uint120` operator.
*
* Requirements:
*
* - input must fit into 120 bits
*/
function toUint120(uint256 value) internal pure returns (uint120) {
if (value > type(uint120).max) {
revert SafeCastOverflowedUintDowncast(120, value);
}
return uint120(value);
}
/**
* @dev Returns the downcasted uint112 from uint256, reverting on
* overflow (when the input is greater than largest uint112).
*
* Counterpart to Solidity's `uint112` operator.
*
* Requirements:
*
* - input must fit into 112 bits
*/
function toUint112(uint256 value) internal pure returns (uint112) {
if (value > type(uint112).max) {
revert SafeCastOverflowedUintDowncast(112, value);
}
return uint112(value);
}
/**
* @dev Returns the downcasted uint104 from uint256, reverting on
* overflow (when the input is greater than largest uint104).
*
* Counterpart to Solidity's `uint104` operator.
*
* Requirements:
*
* - input must fit into 104 bits
*/
function toUint104(uint256 value) internal pure returns (uint104) {
if (value > type(uint104).max) {
revert SafeCastOverflowedUintDowncast(104, value);
}
return uint104(value);
}
/**
* @dev Returns the downcasted uint96 from uint256, reverting on
* overflow (when the input is greater than largest uint96).
*
* Counterpart to Solidity's `uint96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toUint96(uint256 value) internal pure returns (uint96) {
if (value > type(uint96).max) {
revert SafeCastOverflowedUintDowncast(96, value);
}
return uint96(value);
}
/**
* @dev Returns the downcasted uint88 from uint256, reverting on
* overflow (when the input is greater than largest uint88).
*
* Counterpart to Solidity's `uint88` operator.
*
* Requirements:
*
* - input must fit into 88 bits
*/
function toUint88(uint256 value) internal pure returns (uint88) {
if (value > type(uint88).max) {
revert SafeCastOverflowedUintDowncast(88, value);
}
return uint88(value);
}
/**
* @dev Returns the downcasted uint80 from uint256, reverting on
* overflow (when the input is greater than largest uint80).
*
* Counterpart to Solidity's `uint80` operator.
*
* Requirements:
*
* - input must fit into 80 bits
*/
function toUint80(uint256 value) internal pure returns (uint80) {
if (value > type(uint80).max) {
revert SafeCastOverflowedUintDowncast(80, value);
}
return uint80(value);
}
/**
* @dev Returns the downcasted uint72 from uint256, reverting on
* overflow (when the input is greater than largest uint72).
*
* Counterpart to Solidity's `uint72` operator.
*
* Requirements:
*
* - input must fit into 72 bits
*/
function toUint72(uint256 value) internal pure returns (uint72) {
if (value > type(uint72).max) {
revert SafeCastOverflowedUintDowncast(72, value);
}
return uint72(value);
}
/**
* @dev Returns the downcasted uint64 from uint256, reverting on
* overflow (when the input is greater than largest uint64).
*
* Counterpart to Solidity's `uint64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toUint64(uint256 value) internal pure returns (uint64) {
if (value > type(uint64).max) {
revert SafeCastOverflowedUintDowncast(64, value);
}
return uint64(value);
}
/**
* @dev Returns the downcasted uint56 from uint256, reverting on
* overflow (when the input is greater than largest uint56).
*
* Counterpart to Solidity's `uint56` operator.
*
* Requirements:
*
* - input must fit into 56 bits
*/
function toUint56(uint256 value) internal pure returns (uint56) {
if (value > type(uint56).max) {
revert SafeCastOverflowedUintDowncast(56, value);
}
return uint56(value);
}
/**
* @dev Returns the downcasted uint48 from uint256, reverting on
* overflow (when the input is greater than largest uint48).
*
* Counterpart to Solidity's `uint48` operator.
*
* Requirements:
*
* - input must fit into 48 bits
*/
function toUint48(uint256 value) internal pure returns (uint48) {
if (value > type(uint48).max) {
revert SafeCastOverflowedUintDowncast(48, value);
}
return uint48(value);
}
/**
* @dev Returns the downcasted uint40 from uint256, reverting on
* overflow (when the input is greater than largest uint40).
*
* Counterpart to Solidity's `uint40` operator.
*
* Requirements:
*
* - input must fit into 40 bits
*/
function toUint40(uint256 value) internal pure returns (uint40) {
if (value > type(uint40).max) {
revert SafeCastOverflowedUintDowncast(40, value);
}
return uint40(value);
}
/**
* @dev Returns the downcasted uint32 from uint256, reverting on
* overflow (when the input is greater than largest uint32).
*
* Counterpart to Solidity's `uint32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toUint32(uint256 value) internal pure returns (uint32) {
if (value > type(uint32).max) {
revert SafeCastOverflowedUintDowncast(32, value);
}
return uint32(value);
}
/**
* @dev Returns the downcasted uint24 from uint256, reverting on
* overflow (when the input is greater than largest uint24).
*
* Counterpart to Solidity's `uint24` operator.
*
* Requirements:
*
* - input must fit into 24 bits
*/
function toUint24(uint256 value) internal pure returns (uint24) {
if (value > type(uint24).max) {
revert SafeCastOverflowedUintDowncast(24, value);
}
return uint24(value);
}
/**
* @dev Returns the downcasted uint16 from uint256, reverting on
* overflow (when the input is greater than largest uint16).
*
* Counterpart to Solidity's `uint16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toUint16(uint256 value) internal pure returns (uint16) {
if (value > type(uint16).max) {
revert SafeCastOverflowedUintDowncast(16, value);
}
return uint16(value);
}
/**
* @dev Returns the downcasted uint8 from uint256, reverting on
* overflow (when the input is greater than largest uint8).
*
* Counterpart to Solidity's `uint8` operator.
*
* Requirements:
*
* - input must fit into 8 bits
*/
function toUint8(uint256 value) internal pure returns (uint8) {
if (value > type(uint8).max) {
revert SafeCastOverflowedUintDowncast(8, value);
}
return uint8(value);
}
/**
* @dev Converts a signed int256 into an unsigned uint256.
*
* Requirements:
*
* - input must be greater than or equal to 0.
*/
function toUint256(int256 value) internal pure returns (uint256) {
if (value < 0) {
revert SafeCastOverflowedIntToUint(value);
}
return uint256(value);
}
/**
* @dev Returns the downcasted int248 from int256, reverting on
* overflow (when the input is less than smallest int248 or
* greater than largest int248).
*
* Counterpart to Solidity's `int248` operator.
*
* Requirements:
*
* - input must fit into 248 bits
*/
function toInt248(int256 value) internal pure returns (int248 downcasted) {
downcasted = int248(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(248, value);
}
}
/**
* @dev Returns the downcasted int240 from int256, reverting on
* overflow (when the input is less than smallest int240 or
* greater than largest int240).
*
* Counterpart to Solidity's `int240` operator.
*
* Requirements:
*
* - input must fit into 240 bits
*/
function toInt240(int256 value) internal pure returns (int240 downcasted) {
downcasted = int240(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(240, value);
}
}
/**
* @dev Returns the downcasted int232 from int256, reverting on
* overflow (when the input is less than smallest int232 or
* greater than largest int232).
*
* Counterpart to Solidity's `int232` operator.
*
* Requirements:
*
* - input must fit into 232 bits
*/
function toInt232(int256 value) internal pure returns (int232 downcasted) {
downcasted = int232(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(232, value);
}
}
/**
* @dev Returns the downcasted int224 from int256, reverting on
* overflow (when the input is less than smallest int224 or
* greater than largest int224).
*
* Counterpart to Solidity's `int224` operator.
*
* Requirements:
*
* - input must fit into 224 bits
*/
function toInt224(int256 value) internal pure returns (int224 downcasted) {
downcasted = int224(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(224, value);
}
}
/**
* @dev Returns the downcasted int216 from int256, reverting on
* overflow (when the input is less than smallest int216 or
* greater than largest int216).
*
* Counterpart to Solidity's `int216` operator.
*
* Requirements:
*
* - input must fit into 216 bits
*/
function toInt216(int256 value) internal pure returns (int216 downcasted) {
downcasted = int216(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(216, value);
}
}
/**
* @dev Returns the downcasted int208 from int256, reverting on
* overflow (when the input is less than smallest int208 or
* greater than largest int208).
*
* Counterpart to Solidity's `int208` operator.
*
* Requirements:
*
* - input must fit into 208 bits
*/
function toInt208(int256 value) internal pure returns (int208 downcasted) {
downcasted = int208(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(208, value);
}
}
/**
* @dev Returns the downcasted int200 from int256, reverting on
* overflow (when the input is less than smallest int200 or
* greater than largest int200).
*
* Counterpart to Solidity's `int200` operator.
*
* Requirements:
*
* - input must fit into 200 bits
*/
function toInt200(int256 value) internal pure returns (int200 downcasted) {
downcasted = int200(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(200, value);
}
}
/**
* @dev Returns the downcasted int192 from int256, reverting on
* overflow (when the input is less than smallest int192 or
* greater than largest int192).
*
* Counterpart to Solidity's `int192` operator.
*
* Requirements:
*
* - input must fit into 192 bits
*/
function toInt192(int256 value) internal pure returns (int192 downcasted) {
downcasted = int192(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(192, value);
}
}
/**
* @dev Returns the downcasted int184 from int256, reverting on
* overflow (when the input is less than smallest int184 or
* greater than largest int184).
*
* Counterpart to Solidity's `int184` operator.
*
* Requirements:
*
* - input must fit into 184 bits
*/
function toInt184(int256 value) internal pure returns (int184 downcasted) {
downcasted = int184(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(184, value);
}
}
/**
* @dev Returns the downcasted int176 from int256, reverting on
* overflow (when the input is less than smallest int176 or
* greater than largest int176).
*
* Counterpart to Solidity's `int176` operator.
*
* Requirements:
*
* - input must fit into 176 bits
*/
function toInt176(int256 value) internal pure returns (int176 downcasted) {
downcasted = int176(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(176, value);
}
}
/**
* @dev Returns the downcasted int168 from int256, reverting on
* overflow (when the input is less than smallest int168 or
* greater than largest int168).
*
* Counterpart to Solidity's `int168` operator.
*
* Requirements:
*
* - input must fit into 168 bits
*/
function toInt168(int256 value) internal pure returns (int168 downcasted) {
downcasted = int168(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(168, value);
}
}
/**
* @dev Returns the downcasted int160 from int256, reverting on
* overflow (when the input is less than smallest int160 or
* greater than largest int160).
*
* Counterpart to Solidity's `int160` operator.
*
* Requirements:
*
* - input must fit into 160 bits
*/
function toInt160(int256 value) internal pure returns (int160 downcasted) {
downcasted = int160(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(160, value);
}
}
/**
* @dev Returns the downcasted int152 from int256, reverting on
* overflow (when the input is less than smallest int152 or
* greater than largest int152).
*
* Counterpart to Solidity's `int152` operator.
*
* Requirements:
*
* - input must fit into 152 bits
*/
function toInt152(int256 value) internal pure returns (int152 downcasted) {
downcasted = int152(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(152, value);
}
}
/**
* @dev Returns the downcasted int144 from int256, reverting on
* overflow (when the input is less than smallest int144 or
* greater than largest int144).
*
* Counterpart to Solidity's `int144` operator.
*
* Requirements:
*
* - input must fit into 144 bits
*/
function toInt144(int256 value) internal pure returns (int144 downcasted) {
downcasted = int144(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(144, value);
}
}
/**
* @dev Returns the downcasted int136 from int256, reverting on
* overflow (when the input is less than smallest int136 or
* greater than largest int136).
*
* Counterpart to Solidity's `int136` operator.
*
* Requirements:
*
* - input must fit into 136 bits
*/
function toInt136(int256 value) internal pure returns (int136 downcasted) {
downcasted = int136(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(136, value);
}
}
/**
* @dev Returns the downcasted int128 from int256, reverting on
* overflow (when the input is less than smallest int128 or
* greater than largest int128).
*
* Counterpart to Solidity's `int128` operator.
*
* Requirements:
*
* - input must fit into 128 bits
*/
function toInt128(int256 value) internal pure returns (int128 downcasted) {
downcasted = int128(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(128, value);
}
}
/**
* @dev Returns the downcasted int120 from int256, reverting on
* overflow (when the input is less than smallest int120 or
* greater than largest int120).
*
* Counterpart to Solidity's `int120` operator.
*
* Requirements:
*
* - input must fit into 120 bits
*/
function toInt120(int256 value) internal pure returns (int120 downcasted) {
downcasted = int120(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(120, value);
}
}
/**
* @dev Returns the downcasted int112 from int256, reverting on
* overflow (when the input is less than smallest int112 or
* greater than largest int112).
*
* Counterpart to Solidity's `int112` operator.
*
* Requirements:
*
* - input must fit into 112 bits
*/
function toInt112(int256 value) internal pure returns (int112 downcasted) {
downcasted = int112(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(112, value);
}
}
/**
* @dev Returns the downcasted int104 from int256, reverting on
* overflow (when the input is less than smallest int104 or
* greater than largest int104).
*
* Counterpart to Solidity's `int104` operator.
*
* Requirements:
*
* - input must fit into 104 bits
*/
function toInt104(int256 value) internal pure returns (int104 downcasted) {
downcasted = int104(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(104, value);
}
}
/**
* @dev Returns the downcasted int96 from int256, reverting on
* overflow (when the input is less than smallest int96 or
* greater than largest int96).
*
* Counterpart to Solidity's `int96` operator.
*
* Requirements:
*
* - input must fit into 96 bits
*/
function toInt96(int256 value) internal pure returns (int96 downcasted) {
downcasted = int96(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(96, value);
}
}
/**
* @dev Returns the downcasted int88 from int256, reverting on
* overflow (when the input is less than smallest int88 or
* greater than largest int88).
*
* Counterpart to Solidity's `int88` operator.
*
* Requirements:
*
* - input must fit into 88 bits
*/
function toInt88(int256 value) internal pure returns (int88 downcasted) {
downcasted = int88(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(88, value);
}
}
/**
* @dev Returns the downcasted int80 from int256, reverting on
* overflow (when the input is less than smallest int80 or
* greater than largest int80).
*
* Counterpart to Solidity's `int80` operator.
*
* Requirements:
*
* - input must fit into 80 bits
*/
function toInt80(int256 value) internal pure returns (int80 downcasted) {
downcasted = int80(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(80, value);
}
}
/**
* @dev Returns the downcasted int72 from int256, reverting on
* overflow (when the input is less than smallest int72 or
* greater than largest int72).
*
* Counterpart to Solidity's `int72` operator.
*
* Requirements:
*
* - input must fit into 72 bits
*/
function toInt72(int256 value) internal pure returns (int72 downcasted) {
downcasted = int72(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(72, value);
}
}
/**
* @dev Returns the downcasted int64 from int256, reverting on
* overflow (when the input is less than smallest int64 or
* greater than largest int64).
*
* Counterpart to Solidity's `int64` operator.
*
* Requirements:
*
* - input must fit into 64 bits
*/
function toInt64(int256 value) internal pure returns (int64 downcasted) {
downcasted = int64(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(64, value);
}
}
/**
* @dev Returns the downcasted int56 from int256, reverting on
* overflow (when the input is less than smallest int56 or
* greater than largest int56).
*
* Counterpart to Solidity's `int56` operator.
*
* Requirements:
*
* - input must fit into 56 bits
*/
function toInt56(int256 value) internal pure returns (int56 downcasted) {
downcasted = int56(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(56, value);
}
}
/**
* @dev Returns the downcasted int48 from int256, reverting on
* overflow (when the input is less than smallest int48 or
* greater than largest int48).
*
* Counterpart to Solidity's `int48` operator.
*
* Requirements:
*
* - input must fit into 48 bits
*/
function toInt48(int256 value) internal pure returns (int48 downcasted) {
downcasted = int48(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(48, value);
}
}
/**
* @dev Returns the downcasted int40 from int256, reverting on
* overflow (when the input is less than smallest int40 or
* greater than largest int40).
*
* Counterpart to Solidity's `int40` operator.
*
* Requirements:
*
* - input must fit into 40 bits
*/
function toInt40(int256 value) internal pure returns (int40 downcasted) {
downcasted = int40(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(40, value);
}
}
/**
* @dev Returns the downcasted int32 from int256, reverting on
* overflow (when the input is less than smallest int32 or
* greater than largest int32).
*
* Counterpart to Solidity's `int32` operator.
*
* Requirements:
*
* - input must fit into 32 bits
*/
function toInt32(int256 value) internal pure returns (int32 downcasted) {
downcasted = int32(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(32, value);
}
}
/**
* @dev Returns the downcasted int24 from int256, reverting on
* overflow (when the input is less than smallest int24 or
* greater than largest int24).
*
* Counterpart to Solidity's `int24` operator.
*
* Requirements:
*
* - input must fit into 24 bits
*/
function toInt24(int256 value) internal pure returns (int24 downcasted) {
downcasted = int24(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(24, value);
}
}
/**
* @dev Returns the downcasted int16 from int256, reverting on
* overflow (when the input is less than smallest int16 or
* greater than largest int16).
*
* Counterpart to Solidity's `int16` operator.
*
* Requirements:
*
* - input must fit into 16 bits
*/
function toInt16(int256 value) internal pure returns (int16 downcasted) {
downcasted = int16(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(16, value);
}
}
/**
* @dev Returns the downcasted int8 from int256, reverting on
* overflow (when the input is less than smallest int8 or
* greater than largest int8).
*
* Counterpart to Solidity's `int8` operator.
*
* Requirements:
*
* - input must fit into 8 bits
*/
function toInt8(int256 value) internal pure returns (int8 downcasted) {
downcasted = int8(value);
if (downcasted != value) {
revert SafeCastOverflowedIntDowncast(8, value);
}
}
/**
* @dev Converts an unsigned uint256 into a signed int256.
*
* Requirements:
*
* - input must be less than or equal to maxInt256.
*/
function toInt256(uint256 value) internal pure returns (int256) {
// Note: Unsafe cast below is okay because `type(int256).max` is guaranteed to be positive
if (value > uint256(type(int256).max)) {
revert SafeCastOverflowedUintToInt(value);
}
return int256(value);
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/math/SignedMath.sol)
pragma solidity ^0.8.20;
/**
* @dev Standard signed math utilities missing in the Solidity language.
*/
library SignedMath {
/**
* @dev Returns the largest of two signed numbers.
*/
function max(int256 a, int256 b) internal pure returns (int256) {
return a > b ? a : b;
}
/**
* @dev Returns the smallest of two signed numbers.
*/
function min(int256 a, int256 b) internal pure returns (int256) {
return a < b ? a : b;
}
/**
* @dev Returns the average of two signed numbers without overflow.
* The result is rounded towards zero.
*/
function average(int256 a, int256 b) internal pure returns (int256) {
// Formula from the book "Hacker's Delight"
int256 x = (a & b) + ((a ^ b) >> 1);
return x + (int256(uint256(x) >> 255) & (a ^ b));
}
/**
* @dev Returns the absolute unsigned value of a signed value.
*/
function abs(int256 n) internal pure returns (uint256) {
unchecked {
// must be unchecked in order to support `n = type(int256).min`
return uint256(n >= 0 ? n : -n);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Nonces.sol)
pragma solidity ^0.8.20;
/**
* @dev Provides tracking nonces for addresses. Nonces will only increment.
*/
abstract contract Nonces {
/**
* @dev The nonce used for an `account` is not the expected current nonce.
*/
error InvalidAccountNonce(address account, uint256 currentNonce);
mapping(address account => uint256) private _nonces;
/**
* @dev Returns the next unused nonce for an address.
*/
function nonces(address owner) public view virtual returns (uint256) {
return _nonces[owner];
}
/**
* @dev Consumes a nonce.
*
* Returns the current value and increments nonce.
*/
function _useNonce(address owner) internal virtual returns (uint256) {
// For each account, the nonce has an initial value of 0, can only be incremented by one, and cannot be
// decremented or reset. This guarantees that the nonce never overflows.
unchecked {
// It is important to do x++ and not ++x here.
return _nonces[owner]++;
}
}
/**
* @dev Same as {_useNonce} but checking that `nonce` is the next valid for `owner`.
*/
function _useCheckedNonce(address owner, uint256 nonce) internal virtual {
uint256 current = _useNonce(owner);
if (nonce != current) {
revert InvalidAccountNonce(owner, current);
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/ShortStrings.sol)
pragma solidity ^0.8.20;
import {StorageSlot} from "./StorageSlot.sol";
// | string | 0xAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA |
// | length | 0x BB |
type ShortString is bytes32;
/**
* @dev This library provides functions to convert short memory strings
* into a `ShortString` type that can be used as an immutable variable.
*
* Strings of arbitrary length can be optimized using this library if
* they are short enough (up to 31 bytes) by packing them with their
* length (1 byte) in a single EVM word (32 bytes). Additionally, a
* fallback mechanism can be used for every other case.
*
* Usage example:
*
* ```solidity
* contract Named {
* using ShortStrings for *;
*
* ShortString private immutable _name;
* string private _nameFallback;
*
* constructor(string memory contractName) {
* _name = contractName.toShortStringWithFallback(_nameFallback);
* }
*
* function name() external view returns (string memory) {
* return _name.toStringWithFallback(_nameFallback);
* }
* }
* ```
*/
library ShortStrings {
// Used as an identifier for strings longer than 31 bytes.
bytes32 private constant FALLBACK_SENTINEL = 0x00000000000000000000000000000000000000000000000000000000000000FF;
error StringTooLong(string str);
error InvalidShortString();
/**
* @dev Encode a string of at most 31 chars into a `ShortString`.
*
* This will trigger a `StringTooLong` error is the input string is too long.
*/
function toShortString(string memory str) internal pure returns (ShortString) {
bytes memory bstr = bytes(str);
if (bstr.length > 31) {
revert StringTooLong(str);
}
return ShortString.wrap(bytes32(uint256(bytes32(bstr)) | bstr.length));
}
/**
* @dev Decode a `ShortString` back to a "normal" string.
*/
function toString(ShortString sstr) internal pure returns (string memory) {
uint256 len = byteLength(sstr);
// using `new string(len)` would work locally but is not memory safe.
string memory str = new string(32);
/// @solidity memory-safe-assembly
assembly {
mstore(str, len)
mstore(add(str, 0x20), sstr)
}
return str;
}
/**
* @dev Return the length of a `ShortString`.
*/
function byteLength(ShortString sstr) internal pure returns (uint256) {
uint256 result = uint256(ShortString.unwrap(sstr)) & 0xFF;
if (result > 31) {
revert InvalidShortString();
}
return result;
}
/**
* @dev Encode a string into a `ShortString`, or write it to storage if it is too long.
*/
function toShortStringWithFallback(string memory value, string storage store) internal returns (ShortString) {
if (bytes(value).length < 32) {
return toShortString(value);
} else {
StorageSlot.getStringSlot(store).value = value;
return ShortString.wrap(FALLBACK_SENTINEL);
}
}
/**
* @dev Decode a string that was encoded to `ShortString` or written to storage using {setWithFallback}.
*/
function toStringWithFallback(ShortString value, string storage store) internal pure returns (string memory) {
if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
return toString(value);
} else {
return store;
}
}
/**
* @dev Return the length of a string that was encoded to `ShortString` or written to storage using
* {setWithFallback}.
*
* WARNING: This will return the "byte length" of the string. This may not reflect the actual length in terms of
* actual characters as the UTF-8 encoding of a single character can span over multiple bytes.
*/
function byteLengthWithFallback(ShortString value, string storage store) internal view returns (uint256) {
if (ShortString.unwrap(value) != FALLBACK_SENTINEL) {
return byteLength(value);
} else {
return bytes(store).length;
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/StorageSlot.sol)
// This file was procedurally generated from scripts/generate/templates/StorageSlot.js.
pragma solidity ^0.8.20;
/**
* @dev Library for reading and writing primitive types to specific storage slots.
*
* Storage slots are often used to avoid storage conflict when dealing with upgradeable contracts.
* This library helps with reading and writing to such slots without the need for inline assembly.
*
* The functions in this library return Slot structs that contain a `value` member that can be used to read or write.
*
* Example usage to set ERC1967 implementation slot:
* ```solidity
* contract ERC1967 {
* bytes32 internal constant _IMPLEMENTATION_SLOT = 0x360894a13ba1a3210667c828492db98dca3e2076cc3735a920a3ca505d382bbc;
*
* function _getImplementation() internal view returns (address) {
* return StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value;
* }
*
* function _setImplementation(address newImplementation) internal {
* require(newImplementation.code.length > 0);
* StorageSlot.getAddressSlot(_IMPLEMENTATION_SLOT).value = newImplementation;
* }
* }
* ```
*/
library StorageSlot {
struct AddressSlot {
address value;
}
struct BooleanSlot {
bool value;
}
struct Bytes32Slot {
bytes32 value;
}
struct Uint256Slot {
uint256 value;
}
struct StringSlot {
string value;
}
struct BytesSlot {
bytes value;
}
/**
* @dev Returns an `AddressSlot` with member `value` located at `slot`.
*/
function getAddressSlot(bytes32 slot) internal pure returns (AddressSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BooleanSlot` with member `value` located at `slot`.
*/
function getBooleanSlot(bytes32 slot) internal pure returns (BooleanSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Bytes32Slot` with member `value` located at `slot`.
*/
function getBytes32Slot(bytes32 slot) internal pure returns (Bytes32Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `Uint256Slot` with member `value` located at `slot`.
*/
function getUint256Slot(bytes32 slot) internal pure returns (Uint256Slot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` with member `value` located at `slot`.
*/
function getStringSlot(bytes32 slot) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `StringSlot` representation of the string storage pointer `store`.
*/
function getStringSlot(string storage store) internal pure returns (StringSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
/**
* @dev Returns an `BytesSlot` with member `value` located at `slot`.
*/
function getBytesSlot(bytes32 slot) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := slot
}
}
/**
* @dev Returns an `BytesSlot` representation of the bytes storage pointer `store`.
*/
function getBytesSlot(bytes storage store) internal pure returns (BytesSlot storage r) {
/// @solidity memory-safe-assembly
assembly {
r.slot := store.slot
}
}
}
// SPDX-License-Identifier: MIT
// OpenZeppelin Contracts (last updated v5.0.0) (utils/Strings.sol)
pragma solidity ^0.8.20;
import {Math} from "./math/Math.sol";
import {SignedMath} from "./math/SignedMath.sol";
/**
* @dev String operations.
*/
library Strings {
bytes16 private constant HEX_DIGITS = "0123456789abcdef";
uint8 private constant ADDRESS_LENGTH = 20;
/**
* @dev The `value` string doesn't fit in the specified `length`.
*/
error StringsInsufficientHexLength(uint256 value, uint256 length);
/**
* @dev Converts a `uint256` to its ASCII `string` decimal representation.
*/
function toString(uint256 value) internal pure returns (string memory) {
unchecked {
uint256 length = Math.log10(value) + 1;
string memory buffer = new string(length);
uint256 ptr;
/// @solidity memory-safe-assembly
assembly {
ptr := add(buffer, add(32, length))
}
while (true) {
ptr--;
/// @solidity memory-safe-assembly
assembly {
mstore8(ptr, byte(mod(value, 10), HEX_DIGITS))
}
value /= 10;
if (value == 0) break;
}
return buffer;
}
}
/**
* @dev Converts a `int256` to its ASCII `string` decimal representation.
*/
function toStringSigned(int256 value) internal pure returns (string memory) {
return string.concat(value < 0 ? "-" : "", toString(SignedMath.abs(value)));
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation.
*/
function toHexString(uint256 value) internal pure returns (string memory) {
unchecked {
return toHexString(value, Math.log256(value) + 1);
}
}
/**
* @dev Converts a `uint256` to its ASCII `string` hexadecimal representation with fixed length.
*/
function toHexString(uint256 value, uint256 length) internal pure returns (string memory) {
uint256 localValue = value;
bytes memory buffer = new bytes(2 * length + 2);
buffer[0] = "0";
buffer[1] = "x";
for (uint256 i = 2 * length + 1; i > 1; --i) {
buffer[i] = HEX_DIGITS[localValue & 0xf];
localValue >>= 4;
}
if (localValue != 0) {
revert StringsInsufficientHexLength(value, length);
}
return string(buffer);
}
/**
* @dev Converts an `address` with fixed length of 20 bytes to its not checksummed ASCII `string` hexadecimal
* representation.
*/
function toHexString(address addr) internal pure returns (string memory) {
return toHexString(uint256(uint160(addr)), ADDRESS_LENGTH);
}
/**
* @dev Returns true if the two strings are equal.
*/
function equal(string memory a, string memory b) internal pure returns (bool) {
return bytes(a).length == bytes(b).length && keccak256(bytes(a)) == keccak256(bytes(b));
}
}
// SPDX-License-Identifier: GPL-3.0-or-later
pragma solidity ^0.8.24;
import { SafeCast } from "@openzeppelin/contracts/utils/math/SafeCast.sol";
import { ISwapFeePercentageBounds } from "@balancer-labs/v3-interfaces/contracts/vault/ISwapFeePercentageBounds.sol";
import {
IUnbalancedLiquidityInvariantRatioBounds
} from "@balancer-labs/v3-interfaces/contracts/vault/IUnbalancedLiquidityInvariantRatioBounds.sol";
import { IBasePool } from "@balancer-labs/v3-interfaces/contracts/vault/IBasePool.sol";
import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol";
import {
IStablePool,
StablePoolDynamicData,
StablePoolImmutableData,
AmplificationState
} from "@balancer-labs/v3-interfaces/contracts/pool-stable/IStablePool.sol";
import "@balancer-labs/v3-interfaces/contracts/vault/VaultTypes.sol";
import { BasePoolAuthentication } from "@balancer-labs/v3-pool-utils/contracts/BasePoolAuthentication.sol";
import { BalancerPoolToken } from "@balancer-labs/v3-vault/contracts/BalancerPoolToken.sol";
import { FixedPoint } from "@balancer-labs/v3-solidity-utils/contracts/math/FixedPoint.sol";
import { StableMath } from "@balancer-labs/v3-solidity-utils/contracts/math/StableMath.sol";
import { Version } from "@balancer-labs/v3-solidity-utils/contracts/helpers/Version.sol";
import { PoolInfo } from "@balancer-labs/v3-pool-utils/contracts/PoolInfo.sol";
/**
* @notice Standard Balancer Stable Pool.
* @dev Stable Pools are designed for assets that are either expected to consistently swap at near parity,
* or at a known exchange rate. Stable Pools use `StableMath` (based on StableSwap, popularized by Curve),
* which allows for swaps of significant size before encountering substantial price impact, vastly
* increasing capital efficiency for like-kind and correlated-kind swaps.
*
* The `amplificationParameter` determines the "flatness" of the price curve. Higher values "flatten" the
* curve, meaning there is a larger range of balances over which tokens will trade near parity, with very low
* slippage. Generally, the `amplificationParameter` can be higher for tokens with lower volatility, and pools
* with higher liquidity. Lower values more closely approximate the "weighted" math curve, handling greater
* volatility at the cost of higher slippage. This parameter can be changed through permissioned calls
* (see below for details).
*
* The swap fee percentage is bounded by minimum and maximum values (same as were used in v2).
*/
contract StablePool is IStablePool, BalancerPoolToken, BasePoolAuthentication, PoolInfo, Version {
using FixedPoint for uint256;
using SafeCast for *;
// This contract uses timestamps to slowly update its Amplification parameter over time. These changes must occur
// over a minimum time period much larger than the block time, making timestamp manipulation a non-issue.
// solhint-disable not-rely-on-time
// Amplification factor changes must happen over a minimum period of one day, and can at most divide or multiple the
// current value by 2 every day.
// WARNING: this only limits *a single* amplification change to have a maximum rate of change of twice the original
// value daily. It is possible to perform multiple amplification changes in sequence to increase this value more
// rapidly: for example, by doubling the value every day it can increase by a factor of 8 over three days (2^3).
uint256 private constant _MIN_UPDATE_TIME = 1 days;
uint256 private constant _MAX_AMP_UPDATE_DAILY_RATE = 2;
// Fees are 18-decimal, floating point values, which will be stored in the Vault using 24 bits.
// This means they have 0.00001% resolution (i.e., any non-zero bits < 1e11 will cause precision loss).
// Minimum values help make the math well-behaved (i.e., the swap fee should overwhelm any rounding error).
// Maximum values protect users by preventing permissioned actors from setting excessively high swap fees.
uint256 private constant _MIN_SWAP_FEE_PERCENTAGE = 1e12; // 0.0001%
uint256 private constant _MAX_SWAP_FEE_PERCENTAGE = 10e16; // 10%
/// @notice Store amplification state.
AmplificationState private _amplificationState;
/**
* @notice An amplification update has started.
* @param startValue Starting value of the amplification parameter
* @param endValue Ending value of the amplification parameter
* @param startTime Timestamp when the update starts
* @param endTime Timestamp when the update is complete
*/
event AmpUpdateStarted(uint256 startValue, uint256 endValue, uint256 startTime, uint256 endTime);
/**
* @notice An amplification update has been stopped.
* @param currentValue The value at which it stopped
*/
event AmpUpdateStopped(uint256 currentValue);
/// @notice The amplification factor is below the minimum of the range (1 - 5000).
error AmplificationFactorTooLow();
/// @notice The amplification factor is above the maximum of the range (1 - 5000).
error AmplificationFactorTooHigh();
/// @notice The amplification change duration is too short.
error AmpUpdateDurationTooShort();
/// @notice The amplification change rate is too fast.
error AmpUpdateRateTooFast();
/// @notice Amplification update operations must be done one at a time.
error AmpUpdateAlreadyStarted();
/// @notice Cannot stop an amplification update before it starts.
error AmpUpdateNotStarted();
/**
* @notice Parameters used to deploy a new Stable Pool.
* @param name ERC20 token name
* @param symbol ERC20 token symbol
* @param amplificationParameter Controls the "flatness" of the invariant curve. higher values = lower slippage,
* and assumes prices are near parity. lower values = closer to the constant product curve (e.g., more like a
* weighted pool). This has higher slippage, and accommodates greater price volatility
* @param version The stable pool version
*/
struct NewPoolParams {
string name;
string symbol;
uint256 amplificationParameter;
string version;
}
constructor(
NewPoolParams memory params,
IVault vault
)
BalancerPoolToken(vault, params.name, params.symbol)
BasePoolAuthentication(vault, msg.sender)
PoolInfo(vault)
Version(params.version)
{
if (params.amplificationParameter < StableMath.MIN_AMP) {
revert AmplificationFactorTooLow();
}
if (params.amplificationParameter > StableMath.MAX_AMP) {
revert AmplificationFactorTooHigh();
}
uint256 initialAmp = params.amplificationParameter * StableMath.AMP_PRECISION;
_stopAmplification(initialAmp);
}
/// @inheritdoc IBasePool
function computeInvariant(uint256[] memory balancesLiveScaled18, Rounding rounding) public view returns (uint256) {
(uint256 currentAmp, ) = _getAmplificationParameter();
uint256 invariant = StableMath.computeInvariant(currentAmp, balancesLiveScaled18);
if (invariant > 0) {
invariant = rounding == Rounding.ROUND_DOWN ? invariant : invariant + 1;
}
return invariant;
}
/// @inheritdoc IBasePool
function computeBalance(
uint256[] memory balancesLiveScaled18,
uint256 tokenInIndex,
uint256 invariantRatio
) external view returns (uint256 newBalance) {
(uint256 currentAmp, ) = _getAmplificationParameter();
return
StableMath.computeBalance(
currentAmp,
balancesLiveScaled18,
computeInvariant(balancesLiveScaled18, Rounding.ROUND_UP).mulUp(invariantRatio),
tokenInIndex
);
}
/// @inheritdoc IBasePool
function onSwap(PoolSwapParams memory request) public view virtual onlyVault returns (uint256) {
uint256 invariant = computeInvariant(request.balancesScaled18, Rounding.ROUND_DOWN);
(uint256 currentAmp, ) = _getAmplificationParameter();
if (request.kind == SwapKind.EXACT_IN) {
uint256 amountOutScaled18 = StableMath.computeOutGivenExactIn(
currentAmp,
request.balancesScaled18,
request.indexIn,
request.indexOut,
request.amountGivenScaled18,
invariant
);
return amountOutScaled18;
} else {
uint256 amountInScaled18 = StableMath.computeInGivenExactOut(
currentAmp,
request.balancesScaled18,
request.indexIn,
request.indexOut,
request.amountGivenScaled18,
invariant
);
return amountInScaled18;
}
}
/// @inheritdoc IStablePool
function startAmplificationParameterUpdate(uint256 rawEndValue, uint256 endTime) external authenticate {
if (rawEndValue < StableMath.MIN_AMP) {
revert AmplificationFactorTooLow();
}
if (rawEndValue > StableMath.MAX_AMP) {
revert AmplificationFactorTooHigh();
}
uint256 duration = endTime - block.timestamp;
if (duration < _MIN_UPDATE_TIME) {
revert AmpUpdateDurationTooShort();
}
(uint256 currentValue, bool isUpdating) = _getAmplificationParameter();
if (isUpdating) {
revert AmpUpdateAlreadyStarted();
}
uint256 endValue = rawEndValue * StableMath.AMP_PRECISION;
// daily rate = (endValue / currentValue) / duration * 1 day
// We perform all multiplications first to not reduce precision, and round the division up as we want to avoid
// large rates. Note that these are regular integer multiplications and divisions, not fixed point.
uint256 dailyRate = endValue > currentValue
? (endValue * 1 days).divUpRaw(currentValue * duration)
: (currentValue * 1 days).divUpRaw(endValue * duration);
if (dailyRate > _MAX_AMP_UPDATE_DAILY_RATE) {
revert AmpUpdateRateTooFast();
}
// Values are 18 decimal floating point, which fits in 64 bits. Timestamps are 32 bits.
uint64 currentValueUint64 = currentValue.toUint64();
uint64 endValueUint64 = endValue.toUint64();
uint32 startTimeUint32 = block.timestamp.toUint32();
uint32 endTimeUint32 = endTime.toUint32();
_amplificationState.startValue = currentValueUint64;
_amplificationState.endValue = endValueUint64;
_amplificationState.startTime = startTimeUint32;
_amplificationState.endTime = endTimeUint32;
emit AmpUpdateStarted(currentValueUint64, endValueUint64, startTimeUint32, endTimeUint32);
_vault.emitAuxiliaryEvent(
"AmpUpdateStarted",
abi.encode(currentValueUint64, endValueUint64, startTimeUint32, endTimeUint32)
);
}
/// @inheritdoc IStablePool
function stopAmplificationParameterUpdate() external authenticate {
(uint256 currentValue, bool isUpdating) = _getAmplificationParameter();
if (isUpdating == false) {
revert AmpUpdateNotStarted();
}
_stopAmplification(currentValue);
_vault.emitAuxiliaryEvent("AmpUpdateStopped", abi.encode(currentValue));
}
/// @inheritdoc IStablePool
function getAmplificationParameter() external view returns (uint256 value, bool isUpdating, uint256 precision) {
(value, isUpdating) = _getAmplificationParameter();
precision = StableMath.AMP_PRECISION;
}
/// @inheritdoc IStablePool
function getAmplificationState()
external
view
returns (AmplificationState memory amplificationState, uint256 precision)
{
amplificationState = _amplificationState;
precision = StableMath.AMP_PRECISION;
}
function _getAmplificationParameter() internal view returns (uint256 value, bool isUpdating) {
AmplificationState memory state = _amplificationState;
(uint256 startValue, uint256 endValue, uint256 startTime, uint256 endTime) = (
state.startValue,
state.endValue,
state.startTime,
state.endTime
);
// Note that block.timestamp >= startTime, since startTime is set to the current time when an update starts
if (block.timestamp < endTime) {
isUpdating = true;
// We can skip checked arithmetic as:
// - block.timestamp is always larger or equal to startTime
// - endTime is always larger than startTime
// - the value delta is bounded by the largest amplification parameter, which never causes the
// multiplication to overflow.
// This also means that the following computation will never revert nor yield invalid results.
unchecked {
if (endValue > startValue) {
value =
startValue +
((endValue - startValue) * (block.timestamp - startTime)) /
(endTime - startTime);
} else {
value =
startValue -
((startValue - endValue) * (block.timestamp - startTime)) /
(endTime - startTime);
}
}
} else {
isUpdating = false;
value = endValue;
}
}
function _stopAmplification(uint256 value) internal {
uint64 currentValueUint64 = value.toUint64();
_amplificationState.startValue = currentValueUint64;
_amplificationState.endValue = currentValueUint64;
uint32 currentTime = block.timestamp.toUint32();
_amplificationState.startTime = currentTime;
_amplificationState.endTime = currentTime;
emit AmpUpdateStopped(currentValueUint64);
}
/// @inheritdoc ISwapFeePercentageBounds
function getMinimumSwapFeePercentage() external pure returns (uint256) {
return _MIN_SWAP_FEE_PERCENTAGE;
}
/// @inheritdoc ISwapFeePercentageBounds
function getMaximumSwapFeePercentage() external pure returns (uint256) {
return _MAX_SWAP_FEE_PERCENTAGE;
}
/// @inheritdoc IUnbalancedLiquidityInvariantRatioBounds
function getMinimumInvariantRatio() external pure returns (uint256) {
return StableMath.MIN_INVARIANT_RATIO;
}
/// @inheritdoc IUnbalancedLiquidityInvariantRatioBounds
function getMaximumInvariantRatio() external pure returns (uint256) {
return StableMath.MAX_INVARIANT_RATIO;
}
/// @inheritdoc IStablePool
function getStablePoolDynamicData() external view returns (StablePoolDynamicData memory data) {
data.balancesLiveScaled18 = _vault.getCurrentLiveBalances(address(this));
(, data.tokenRates) = _vault.getPoolTokenRates(address(this));
data.staticSwapFeePercentage = _vault.getStaticSwapFeePercentage((address(this)));
data.totalSupply = totalSupply();
data.bptRate = getRate();
(data.amplificationParameter, data.isAmpUpdating) = _getAmplificationParameter();
AmplificationState memory state = _amplificationState;
data.startValue = state.startValue;
data.endValue = state.endValue;
data.startTime = state.startTime;
data.endTime = state.endTime;
PoolConfig memory poolConfig = _vault.getPoolConfig(address(this));
data.isPoolInitialized = poolConfig.isPoolInitialized;
data.isPoolPaused = poolConfig.isPoolPaused;
data.isPoolInRecoveryMode = poolConfig.isPoolInRecoveryMode;
}
/// @inheritdoc IStablePool
function getStablePoolImmutableData() external view returns (StablePoolImmutableData memory data) {
data.tokens = _vault.getPoolTokens(address(this));
(data.decimalScalingFactors, ) = _vault.getPoolTokenRates(address(this));
data.amplificationParameterPrecision = StableMath.AMP_PRECISION;
}
}