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Contract Source Code Verified (Exact Match)
Contract Name:
WeightedPoolFactory
Compiler Version
v0.8.26+commit.8a97fa7a
Optimization Enabled:
Yes with 9999 runs
Other Settings:
cancun EvmVersion
Contract Source Code (Solidity Standard Json-Input format)
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.24; import { IPoolVersion } from "@balancer-labs/v3-interfaces/contracts/solidity-utils/helpers/IPoolVersion.sol"; import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol"; import { TokenConfig, PoolRoleAccounts, LiquidityManagement } from "@balancer-labs/v3-interfaces/contracts/vault/VaultTypes.sol"; import { BasePoolFactory } from "@balancer-labs/v3-pool-utils/contracts/BasePoolFactory.sol"; import { Version } from "@balancer-labs/v3-solidity-utils/contracts/helpers/Version.sol"; import { WeightedPool } from "./WeightedPool.sol"; /** * @notice General Weighted Pool factory * @dev This is the most general factory, which allows up to eight tokens and arbitrary weights. */ contract WeightedPoolFactory is IPoolVersion, BasePoolFactory, Version { // solhint-disable not-rely-on-time string private _poolVersion; constructor( IVault vault, uint32 pauseWindowDuration, string memory factoryVersion, string memory poolVersion ) BasePoolFactory(vault, pauseWindowDuration, type(WeightedPool).creationCode) Version(factoryVersion) { _poolVersion = poolVersion; } /// @inheritdoc IPoolVersion function getPoolVersion() external view returns (string memory) { return _poolVersion; } /** * @notice Deploys a new `WeightedPool`. * @dev Tokens must be sorted for pool registration. * @param name The name of the pool * @param symbol The symbol of the pool * @param tokens An array of descriptors for the tokens the pool will manage * @param normalizedWeights The pool weights (must add to FixedPoint.ONE) * @param roleAccounts Addresses the Vault will allow to change certain pool settings * @param swapFeePercentage Initial swap fee percentage * @param poolHooksContract Contract that implements the hooks for the pool * @param enableDonation If true, the pool will support the donation add liquidity mechanism * @param disableUnbalancedLiquidity If true, only proportional add and remove liquidity are accepted * @param salt The salt value that will be passed to create2 deployment */ function create( string memory name, string memory symbol, TokenConfig[] memory tokens, uint256[] memory normalizedWeights, PoolRoleAccounts memory roleAccounts, uint256 swapFeePercentage, address poolHooksContract, bool enableDonation, bool disableUnbalancedLiquidity, bytes32 salt ) external returns (address pool) { if (roleAccounts.poolCreator != address(0)) { revert StandardPoolWithCreator(); } LiquidityManagement memory liquidityManagement = getDefaultLiquidityManagement(); liquidityManagement.enableDonation = enableDonation; // disableUnbalancedLiquidity must be set to true if a hook has the flag enableHookAdjustedAmounts = true. liquidityManagement.disableUnbalancedLiquidity = disableUnbalancedLiquidity; pool = _create( abi.encode( WeightedPool.NewPoolParams({ name: name, symbol: symbol, numTokens: tokens.length, normalizedWeights: normalizedWeights, version: _poolVersion }), getVault() ), salt ); _registerPoolWithVault( pool, tokens, swapFeePercentage, false, // not exempt from protocol fees roleAccounts, poolHooksContract, liquidityManagement ); } }
// 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; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { IBasePool } from "../vault/IBasePool.sol"; /** * @notice Weighted 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 normalizedWeights The token weights, sorted in token registration order */ struct WeightedPoolImmutableData { IERC20[] tokens; uint256[] decimalScalingFactors; uint256[] normalizedWeights; } /** * @notice Snapshot of current Weighted 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 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 WeightedPoolDynamicData { uint256[] balancesLiveScaled18; uint256[] tokenRates; uint256 staticSwapFeePercentage; uint256 totalSupply; bool isPoolInitialized; bool isPoolPaused; bool isPoolInRecoveryMode; } /// @notice Full Weighted pool interface. interface IWeightedPool is IBasePool { /** * @notice Get the normalized weights. * @return normalizedWeights The normalized weights, sorted in token registration order */ function getNormalizedWeights() external view returns (uint256[] memory normalizedWeights); /** * @notice Get dynamic pool data relevant to swap/add/remove calculations. * @return data A struct containing all dynamic weighted pool parameters */ function getWeightedPoolDynamicData() external view returns (WeightedPoolDynamicData memory data); /** * @notice Get immutable pool data relevant to swap/add/remove calculations. * @return data A struct containing all immutable weighted pool parameters */ function getWeightedPoolImmutableData() external view returns (WeightedPoolImmutableData memory data); }
// 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 Simple interface to retrieve the version of pools deployed by a pool factory. interface IPoolVersion { /** * @notice Returns a JSON representation of the deployed pool version containing name, version number and task ID. * @dev This is typically only useful in complex Pool deployment schemes, where multiple subsystems need to know * about each other. Note that this value will only be set at factory creation time. * * @return poolVersion A string representation of the pool version */ function getPoolVersion() external view returns (string memory poolVersion); }
// 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; import { IAuthentication } from "../solidity-utils/helpers/IAuthentication.sol"; /** * @notice Base interface for a Balancer Pool Factory. * @dev All pool factories should be derived from `BasePoolFactory` to enable common behavior for all pool types * (e.g., address prediction, tracking deployed pools, and governance-facilitated migration). */ interface IBasePoolFactory is IAuthentication { /** * @notice A pool was deployed. * @param pool The address of the new pool */ event PoolCreated(address indexed pool); /// @notice The factory was disabled by governance. event FactoryDisabled(); /// @notice Attempted pool creation after the factory was disabled. error Disabled(); /// @notice A pool index is beyond the current bounds of the array. error IndexOutOfBounds(); /** * @notice Check whether a pool was deployed by this factory. * @param pool The pool to check * @return success True if `pool` was created by this factory */ function isPoolFromFactory(address pool) external view returns (bool success); /** * @notice Return the total number of pools deployed by this factory. * @dev This can then be used to "paginate" calls to `getPools` to control gas costs. * @return poolCount The number of pools deployed by this factory */ function getPoolCount() external view returns (uint256 poolCount); /** * @notice Return a subset of the list of pools deployed by this factory. * @dev `start` must be a valid index, but if `count` exceeds the total length, it will not revert, but simply * stop at the end and return fewer results than requested. * * @param start The index of the first pool to return * @param count The maximum number of pools to return * @return pools The list of pools deployed by this factory, starting at `start` and returning up to `count` pools */ function getPoolsInRange(uint256 start, uint256 count) external view returns (address[] memory pools); /** * @notice Return the complete list of pools deployed by this factory. * @return pools The list of pools deployed by this factory */ function getPools() external view returns (address[] memory pools); /** * @notice Return the address where a new pool will be deployed, based on the factory address and salt. * @param constructorArgs The arguments used to create the pool * @param salt The salt used to deploy the pool * @return deploymentAddress The predicted address of the pool, given the salt */ function getDeploymentAddress( bytes memory constructorArgs, bytes32 salt ) external view returns (address deploymentAddress); /** * @notice Check whether this factory has been disabled by governance. * @return success True if this factory was disabled */ function isDisabled() external view returns (bool success); /** * @notice Disable the factory, preventing the creation of more pools. * @dev Existing pools are unaffected. Once a factory is disabled, it cannot be re-enabled. */ function disable() external; }
// 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 { Create2 } from "@openzeppelin/contracts/utils/Create2.sol"; import { IBasePoolFactory } from "@balancer-labs/v3-interfaces/contracts/vault/IBasePoolFactory.sol"; import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol"; import { TokenConfig, PoolRoleAccounts, LiquidityManagement } from "@balancer-labs/v3-interfaces/contracts/vault/VaultTypes.sol"; import { FactoryWidePauseWindow } from "@balancer-labs/v3-solidity-utils/contracts/helpers/FactoryWidePauseWindow.sol"; import { SingletonAuthentication } from "@balancer-labs/v3-vault/contracts/SingletonAuthentication.sol"; /** * @notice Base contract for Pool factories. * * Pools are deployed from factories to allow third parties to more easily reason about them. Unknown Pools may have * arbitrary logic: being able to assert that a Pool's behavior follows certain rules (those imposed by the contracts * created by the factory) is very powerful. * * Note that in v3, the factory alone is not enough to ensure the safety of a pool. v3 pools can have arbitrary hook * contracts, rate providers, complex tokens, and configuration that significantly impacts pool behavior. Specialty * factories can be designed to limit their pools range of behavior (e.g., weighted 80/20 factories where the token * count and weights are fixed). * * Since we expect to release new versions of pool types regularly - and the blockchain is forever - versioning will * become increasingly important. Governance can deprecate a factory by calling `disable`, which will permanently * prevent the creation of any future pools from the factory. * * Use of factories is also important for security. Calls to `registerPool` or `initialize` made directly on the Vault * could potentially be frontrun. In the case of registration, a DoS attack could register a pool with malicious * parameters, causing the legitimate registration transaction to fail. The standard Balancer factories avoid this by * deploying and registering in a single `create` function. * * It would also be possible to frontrun `initialize` (e.g., with unbalanced liquidity), and cause the intended * initialization to fail. Like registration, initialization only happens once. The Balancer standard factories do not * initialize on create, as this would be more complex (e.g., requiring token approvals), and it's very common for the * deployment and funding to be performed from different accounts. Also, frontrunning `initialize` doesn't have serious * consequences, beyond being a DoS. * * Nevertheless, this is a factor to consider when launching new pools. To avoid any possibility of frontrunning, * the best practice would be to create (i.e., deploy and register) and initialize in the same transaction. */ abstract contract BasePoolFactory is IBasePoolFactory, SingletonAuthentication, FactoryWidePauseWindow { mapping(address pool => bool isFromFactory) private _isPoolFromFactory; address[] private _pools; bool private _disabled; // Store the creationCode of the contract to be deployed by create2. bytes private _creationCode; /// @notice A pool creator was specified for a pool from a Balancer core pool type. error StandardPoolWithCreator(); constructor( IVault vault, uint32 pauseWindowDuration, bytes memory creationCode ) SingletonAuthentication(vault) FactoryWidePauseWindow(pauseWindowDuration) { _creationCode = creationCode; } /// @inheritdoc IBasePoolFactory function isPoolFromFactory(address pool) external view returns (bool) { return _isPoolFromFactory[pool]; } /// @inheritdoc IBasePoolFactory function getPoolCount() external view returns (uint256) { return _pools.length; } /// @inheritdoc IBasePoolFactory function getPools() external view returns (address[] memory) { return _pools; } /// @inheritdoc IBasePoolFactory function getPoolsInRange(uint256 start, uint256 count) external view returns (address[] memory pools) { uint256 length = _pools.length; if (start >= length) { revert IndexOutOfBounds(); } // If `count` requests more pools than we have available, stop at the end of the array. uint256 end = start + count; if (end > length) { count = length - start; } pools = new address[](count); for (uint256 i = 0; i < count; i++) { pools[i] = _pools[start + i]; } } /// @inheritdoc IBasePoolFactory function isDisabled() public view returns (bool) { return _disabled; } /// @inheritdoc IBasePoolFactory function getDeploymentAddress(bytes memory constructorArgs, bytes32 salt) public view returns (address) { bytes memory creationCode = abi.encodePacked(_creationCode, constructorArgs); bytes32 creationCodeHash = keccak256(creationCode); bytes32 finalSalt = _computeFinalSalt(salt); return Create2.computeAddress(finalSalt, creationCodeHash); } /// @inheritdoc IBasePoolFactory function disable() external authenticate { _ensureEnabled(); _disabled = true; emit FactoryDisabled(); } function _ensureEnabled() internal view { if (isDisabled()) { revert Disabled(); } } function _registerPoolWithFactory(address pool) internal virtual { _ensureEnabled(); _isPoolFromFactory[pool] = true; _pools.push(pool); emit PoolCreated(pool); } /** * @dev Factories that require a custom-calculated salt can override to replace this default salt processing. * By default, the pool address determinants include the sender and chain id, as well as the user-provided salt, * so contracts will generally not have the same address on different L2s. */ function _computeFinalSalt(bytes32 salt) internal view virtual returns (bytes32) { return keccak256(abi.encode(msg.sender, block.chainid, salt)); } function _create(bytes memory constructorArgs, bytes32 salt) internal returns (address pool) { bytes memory creationCode = abi.encodePacked(_creationCode, constructorArgs); bytes32 finalSalt = _computeFinalSalt(salt); pool = Create2.deploy(0, finalSalt, creationCode); _registerPoolWithFactory(pool); } function _registerPoolWithVault( address pool, TokenConfig[] memory tokens, uint256 swapFeePercentage, bool protocolFeeExempt, PoolRoleAccounts memory roleAccounts, address poolHooksContract, LiquidityManagement memory liquidityManagement ) internal { getVault().registerPool( pool, tokens, swapFeePercentage, getNewPoolPauseWindowEndTime(), protocolFeeExempt, roleAccounts, poolHooksContract, liquidityManagement ); } /// @notice A common place to retrieve a default hooks contract. Currently set to address(0) (i.e. no hooks). function getDefaultPoolHooksContract() public pure returns (address) { return address(0); } /** * @notice Convenience function for constructing a LiquidityManagement object. * @dev Users can call this to create a structure with all false arguments, then set the ones they need to true. * @return liquidityManagement Liquidity management flags, all initialized to false */ function getDefaultLiquidityManagement() public pure returns (LiquidityManagement memory liquidityManagement) { // solhint-disable-previous-line no-empty-blocks } }
// 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 { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; /// @notice Library of helper functions related to typecasting arrays. library CastingHelpers { /// @dev Returns a native array of addresses as an IERC20[] array. function asIERC20(address[] memory addresses) internal pure returns (IERC20[] memory tokens) { // solhint-disable-next-line no-inline-assembly assembly ("memory-safe") { tokens := addresses } } /// @dev Returns an IERC20[] array as an address[] array. function asAddress(IERC20[] memory tokens) internal pure returns (address[] memory addresses) { // solhint-disable-next-line no-inline-assembly assembly ("memory-safe") { addresses := tokens } } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.24; /** * @notice Base contract for v3 factories to support pause windows for pools based on the factory deployment time. * @dev Each pool deployment calls `getPauseWindowDuration` on the factory so that all Pools created by this factory * will share the same Pause Window end time, after which both old and new Pools will not be pausable. * * All pools are reversibly pausable until the pause window expires. Afterward, there is an additional buffer * period, set to the same duration as the Vault's buffer period. If a pool was paused, it will remain paused * through this buffer period, and cannot be unpaused. * * When the buffer period expires, it will unpause automatically, and remain permissionless forever after. */ contract FactoryWidePauseWindow { // This contract relies on timestamps - the usual caveats apply. // solhint-disable not-rely-on-time // The pause window end time is stored in 32 bits. uint32 private constant _MAX_TIMESTAMP = type(uint32).max; uint32 private immutable _pauseWindowDuration; // Time when the pause window for all created Pools expires. uint32 private immutable _poolsPauseWindowEndTime; /// @notice The factory deployer gave a duration that would overflow the Unix timestamp. error PoolPauseWindowDurationOverflow(); constructor(uint32 pauseWindowDuration) { uint256 pauseWindowEndTime = block.timestamp + pauseWindowDuration; if (pauseWindowEndTime > _MAX_TIMESTAMP) { revert PoolPauseWindowDurationOverflow(); } _pauseWindowDuration = pauseWindowDuration; // Direct cast is safe, as it was checked above. _poolsPauseWindowEndTime = uint32(pauseWindowEndTime); } /** * @notice Return the pause window duration. This is the time pools will be pausable after factory deployment. * @return pauseWindowDuration The duration in seconds */ function getPauseWindowDuration() external view returns (uint32) { return _pauseWindowDuration; } /** * @notice Returns the original factory pauseWindowEndTime, regardless of the current time. * @return pauseWindowEndTime The end time as a timestamp */ function getOriginalPauseWindowEndTime() external view returns (uint32) { return _poolsPauseWindowEndTime; } /** * @notice Returns the current pauseWindowEndTime that will be applied to Pools created by this factory. * @dev We intend for all pools deployed by this factory to have the same pause window end time (i.e., after * this date, all future pools will be unpausable). This function will return `_poolsPauseWindowEndTime` * until it passes, after which it will return 0. * * @return pauseWindowEndTime The resolved pause window end time (0 indicating it's no longer pausable) */ function getNewPoolPauseWindowEndTime() public view returns (uint32) { // We know _poolsPauseWindowEndTime <= _MAX_TIMESTAMP (checked above). // Do not truncate timestamp; it should still return 0 after _MAX_TIMESTAMP. return (block.timestamp < _poolsPauseWindowEndTime) ? _poolsPauseWindowEndTime : 0; } }
// SPDX-License-Identifier: GPL-3.0-or-later pragma solidity ^0.8.24; import { IERC20 } from "@openzeppelin/contracts/token/ERC20/IERC20.sol"; import { CastingHelpers } from "./CastingHelpers.sol"; library InputHelpers { /// @notice Arrays passed to a function and intended to be parallel have different lengths. error InputLengthMismatch(); /** * @notice More than one non-zero value was given for a single token operation. * @dev Input arrays for single token add/remove liquidity operations are expected to have only one non-zero value, * corresponding to the token being added or removed. This error results if there are multiple non-zero entries. */ error MultipleNonZeroInputs(); /** * @notice No valid input was given for a single token operation. * @dev Input arrays for single token add/remove liquidity operations are expected to have one non-zero value, * corresponding to the token being added or removed. This error results if all entries are zero. */ error AllZeroInputs(); /** * @notice The tokens supplied to an array argument were not sorted in numerical order. * @dev Tokens are not sorted by address on registration. This is an optimization so that off-chain processes can * predict the token order without having to query the Vault. (It is also legacy v2 behavior.) */ error TokensNotSorted(); function ensureInputLengthMatch(uint256 a, uint256 b) internal pure { if (a != b) { revert InputLengthMismatch(); } } function ensureInputLengthMatch(uint256 a, uint256 b, uint256 c) internal pure { if (a != b || b != c) { revert InputLengthMismatch(); } } // Find the single non-zero input; revert if there is not exactly one such value. function getSingleInputIndex(uint256[] memory maxAmountsIn) internal pure returns (uint256 inputIndex) { uint256 length = maxAmountsIn.length; inputIndex = length; for (uint256 i = 0; i < length; ++i) { if (maxAmountsIn[i] != 0) { if (inputIndex != length) { revert MultipleNonZeroInputs(); } inputIndex = i; } } if (inputIndex >= length) { revert AllZeroInputs(); } return inputIndex; } /** * @dev Sort an array of tokens, mutating in place (and also returning them). * This assumes the tokens have been (or will be) validated elsewhere for length * and non-duplication. All this does is the sorting. * * A bubble sort should be gas- and bytecode-efficient enough for such small arrays. * Could have also done "manual" comparisons for each of the cases, but this is * about the same number of operations, and more concise. * * This is less efficient for larger token count (i.e., above 4), but such pools should * be rare. And in any case, sorting is only done on-chain in test code. */ function sortTokens(IERC20[] memory tokens) internal pure returns (IERC20[] memory) { for (uint256 i = 0; i < tokens.length - 1; ++i) { for (uint256 j = 0; j < tokens.length - i - 1; ++j) { if (tokens[j] > tokens[j + 1]) { // Swap if they're out of order. (tokens[j], tokens[j + 1]) = (tokens[j + 1], tokens[j]); } } } return tokens; } /// @dev Ensure an array of tokens is sorted. As above, does not validate length or uniqueness. function ensureSortedTokens(IERC20[] memory tokens) internal pure { IERC20 previous = tokens[0]; for (uint256 i = 1; i < tokens.length; ++i) { IERC20 current = tokens[i]; if (previous > current) { revert TokensNotSorted(); } previous = current; } } }
// 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 Implementation of Balancer Weighted Math, essentially unchanged since v1. * @dev It is a generalization of the x * y = k constant product formula, accounting for cases with more than two * tokens, and weights that are not 50/50. See https://docs.qr68.com/tech-implementations/weighted-math. * * 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 chosen the rounding direction to favor the protocol in all cases. */ library WeightedMath { using FixedPoint for uint256; /// @notice User attempted to extract a disproportionate amountOut of tokens from a pool. error MaxOutRatio(); /// @notice User attempted to add a disproportionate amountIn of tokens to a pool. error MaxInRatio(); /** * @notice Error thrown when the calculated invariant is zero, indicating an issue with the invariant calculation. * @dev Most commonly, this happens when a token balance is zero. */ error ZeroInvariant(); // Pool limits that arise from limitations in the fixed point power function. When computing x^y, the valid range // of `x` is -41 (ExpMin) to 130 (ExpMax). See `LogExpMath.sol` for the derivation of these values. // // Invariant calculation: // In computing `balance^normalizedWeight`, `log(balance) * normalizedWeight` must fall within the `pow` function // bounds described above. Since 0.01 <= normalizedWeight <= 0.99, the balance is constrained to the range between // e^(ExpMin) and e^(ExpMax). // // This corresponds to 10^(-18) < balance < 2^(188.56). Since the maximum balance is 2^(128) - 1, the invariant // calculation is unconstrained by the `pow` function limits. // // It's a different story with `computeBalanceOutGivenInvariant` (inverse invariant): // This uses the power function to raise the invariant ratio to the power of 1/weight. Similar to the computation // for the invariant, this means the following expression must hold: // ExpMin < log(invariantRatio) * 1/weight < ExpMax // // Given the valid range of weights (i.e., 1 < 1/weight < 100), we have: // ExpMin/100 < log(invariantRatio) < ExpMax/100, or e^(-0.41) < invariantRatio < e^(1.3). Numerically, this // constrains the invariantRatio to between 0.661 and 3.695. For an added safety margin, we set the limits to // 0.7 < invariantRatio < 3. // Swap limits: amounts swapped may not be larger than this percentage of the total balance. uint256 internal constant _MAX_IN_RATIO = 30e16; // 30% uint256 internal constant _MAX_OUT_RATIO = 30e16; // 30% // Invariant growth limit: non-proportional add cannot cause the invariant to increase by more than this ratio. uint256 internal constant _MAX_INVARIANT_RATIO = 300e16; // 300% // Invariant shrink limit: non-proportional remove cannot cause the invariant to decrease by less than this ratio. uint256 internal constant _MIN_INVARIANT_RATIO = 70e16; // 70% /** * @notice Compute the invariant, rounding down. * @dev The invariant functions are called by the Vault during various liquidity operations, and require a specific * rounding direction in order to ensure safety (i.e., that the final result is always rounded in favor of the * protocol. The invariant (i.e., all token balances) must always be greater than 0, or it will revert. * * @param normalizedWeights The pool token weights, sorted in token registration order * @param balances The pool token balances, sorted in token registration order * @return invariant The invariant, rounded down */ function computeInvariantDown( uint256[] memory normalizedWeights, uint256[] memory balances ) internal pure returns (uint256 invariant) { /********************************************************************************************** // invariant _____ // // wi = weight index i | | wi // // bi = balance index i | | bi ^ = i // // i = invariant // **********************************************************************************************/ invariant = FixedPoint.ONE; for (uint256 i = 0; i < normalizedWeights.length; ++i) { invariant = invariant.mulDown(balances[i].powDown(normalizedWeights[i])); } if (invariant == 0) { revert ZeroInvariant(); } } /** * @notice Compute the invariant, rounding up. * @dev The invariant functions are called by the Vault during various liquidity operations, and require a specific * rounding direction in order to ensure safety (i.e., that the final result is always rounded in favor of the * protocol. The invariant (i.e., all token balances) must always be greater than 0, or it will revert. * * @param normalizedWeights The pool token weights, sorted in token registration order * @param balances The pool token balances, sorted in token registration order * @return invariant The invariant, rounded up */ function computeInvariantUp( uint256[] memory normalizedWeights, uint256[] memory balances ) internal pure returns (uint256 invariant) { /********************************************************************************************** // invariant _____ // // wi = weight index i | | wi // // bi = balance index i | | bi ^ = i // // i = invariant // **********************************************************************************************/ invariant = FixedPoint.ONE; for (uint256 i = 0; i < normalizedWeights.length; ++i) { invariant = invariant.mulUp(balances[i].powUp(normalizedWeights[i])); } if (invariant == 0) { revert ZeroInvariant(); } } /** * @notice Compute a token balance after a liquidity operation, given the current balance and invariant ratio. * @dev This is called as part of the "inverse invariant" `computeBalance` calculation. * @param currentBalance The current balance of the token * @param weight The weight of the token * @param invariantRatio The invariant ratio (i.e., new/old; will be > 1 for add; < 1 for remove) * @return newBalance The adjusted token balance after the operation */ function computeBalanceOutGivenInvariant( uint256 currentBalance, uint256 weight, uint256 invariantRatio ) internal pure returns (uint256 newBalance) { /****************************************************************************************** // calculateBalanceGivenInvariant // // o = balanceOut // // b = balanceIn (1 / w) // // w = weight o = b * i ^ // // i = invariantRatio // ******************************************************************************************/ // Rounds result up overall, rounding up the two individual steps: // - balanceRatio = invariantRatio ^ (1 / weight) // - newBalance = balance * balanceRatio // // Regarding `balanceRatio`, the exponent is always > FP(1), but the invariant ratio can be either greater or // lower than FP(1) depending on whether this is solving an `add` or a `remove` operation. // - For i > 1, we need to round the exponent up, as i^x is monotonically increasing for i > 1. // - For i < 1, we need to round the exponent down, as as i^x is monotonically decreasing for i < 1. function(uint256, uint256) internal pure returns (uint256) divUpOrDown = invariantRatio > 1 ? FixedPoint.divUp : FixedPoint.divDown; // Calculate by how much the token balance has to increase to match the invariantRatio. uint256 balanceRatio = invariantRatio.powUp(divUpOrDown(FixedPoint.ONE, weight)); return currentBalance.mulUp(balanceRatio); } /** * @notice Compute the `amountOut` of tokenOut in a swap, given the current balances and weights. * @param balanceIn The current balance of `tokenIn` * @param weightIn The weight of `tokenIn` * @param balanceOut The current balance of `tokenOut` * @param weightOut The weight of `tokenOut` * @param amountIn The exact amount of `tokenIn` (i.e., the amount given in an ExactIn swap) * @return amountOut The calculated amount of `tokenOut` returned in an ExactIn swap */ function computeOutGivenExactIn( uint256 balanceIn, uint256 weightIn, uint256 balanceOut, uint256 weightOut, uint256 amountIn ) internal pure returns (uint256 amountOut) { /********************************************************************************************** // outGivenExactIn // // aO = amountOut // // bO = balanceOut // // bI = balanceIn / / bI \ (wI / wO) \ // // aI = amountIn aO = bO * | 1 - | -------------------------- | ^ | // // wI = weightIn \ \ ( bI + aI ) / / // // wO = weightOut // **********************************************************************************************/ // Amount out, so we round down overall. // The multiplication rounds down, and the subtrahend (power) rounds up (so the base rounds up too). // Because bI / (bI + aI) <= 1, the exponent rounds down. // Cannot exceed maximum in ratio. if (amountIn > balanceIn.mulDown(_MAX_IN_RATIO)) { revert MaxInRatio(); } uint256 denominator = balanceIn + amountIn; uint256 base = balanceIn.divUp(denominator); uint256 exponent = weightIn.divDown(weightOut); uint256 power = base.powUp(exponent); // Because of rounding up, power can be greater than one. Using complement prevents reverts. return balanceOut.mulDown(power.complement()); } /** * @notice Compute the `amountIn` of tokenIn in a swap, given the current balances and weights. * @param balanceIn The current balance of `tokenIn` * @param weightIn The weight of `tokenIn` * @param balanceOut The current balance of `tokenOut` * @param weightOut The weight of `tokenOut` * @param amountOut The exact amount of `tokenOut` (i.e., the amount given in an ExactOut swap) * @return amountIn The calculated amount of `tokenIn` returned in an ExactOut swap */ function computeInGivenExactOut( uint256 balanceIn, uint256 weightIn, uint256 balanceOut, uint256 weightOut, uint256 amountOut ) internal pure returns (uint256 amountIn) { /********************************************************************************************** // inGivenExactOut // // aO = amountOut // // bO = balanceOut // // bI = balanceIn / / bO \ (wO / wI) \ // // aI = amountIn aI = bI * | | -------------------------- | ^ - 1 | // // wI = weightIn \ \ ( bO - aO ) / / // // wO = weightOut // **********************************************************************************************/ // Amount in, so we round up overall. // The multiplication rounds up, and the power rounds up (so the base rounds up too). // Because b0 / (b0 - a0) >= 1, the exponent rounds up. // Cannot exceed maximum out ratio. if (amountOut > balanceOut.mulDown(_MAX_OUT_RATIO)) { revert MaxOutRatio(); } uint256 base = balanceOut.divUp(balanceOut - amountOut); uint256 exponent = weightOut.divUp(weightIn); uint256 power = base.powUp(exponent); // Because the base is larger than one (and the power rounds up), the power should always be larger than one, so // the following subtraction should never revert. uint256 ratio = power - FixedPoint.ONE; return balanceIn.mulUp(ratio); } }
// 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 { IAuthorizer } from "@balancer-labs/v3-interfaces/contracts/vault/IAuthorizer.sol"; import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol"; import { Authentication } from "@balancer-labs/v3-solidity-utils/contracts/helpers/Authentication.sol"; /** * @notice Base contract suitable for Singleton contracts (e.g., pool factories) that have permissioned functions. * @dev The disambiguator is the contract's own address. This is used in the construction of actionIds for permissioned * functions, to avoid conflicts when multiple contracts (or multiple versions of the same contract) use the same * function name. */ abstract contract SingletonAuthentication is Authentication { IVault private immutable _vault; // Use the contract's own address to disambiguate action identifiers. constructor(IVault vault) Authentication(bytes32(uint256(uint160(address(this))))) { _vault = vault; } /** * @notice Get the address of the Balancer Vault. * @return vault An interface pointer to the Vault */ function getVault() public view returns (IVault) { return _vault; } /** * @notice Get the address of the Authorizer. * @return authorizer An interface pointer to the Authorizer */ function getAuthorizer() public view returns (IAuthorizer) { return getVault().getAuthorizer(); } function _canPerform(bytes32 actionId, address account) internal view override returns (bool) { return getAuthorizer().canPerform(actionId, account, address(this)); } function _canPerform(bytes32 actionId, address account, address where) internal view returns (bool) { return getAuthorizer().canPerform(actionId, account, where); } }
// 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/Create2.sol) pragma solidity ^0.8.20; /** * @dev Helper to make usage of the `CREATE2` EVM opcode easier and safer. * `CREATE2` can be used to compute in advance the address where a smart * contract will be deployed, which allows for interesting new mechanisms known * as 'counterfactual interactions'. * * See the https://eips.ethereum.org/EIPS/eip-1014#motivation[EIP] for more * information. */ library Create2 { /** * @dev Not enough balance for performing a CREATE2 deploy. */ error Create2InsufficientBalance(uint256 balance, uint256 needed); /** * @dev There's no code to deploy. */ error Create2EmptyBytecode(); /** * @dev The deployment failed. */ error Create2FailedDeployment(); /** * @dev Deploys a contract using `CREATE2`. The address where the contract * will be deployed can be known in advance via {computeAddress}. * * The bytecode for a contract can be obtained from Solidity with * `type(contractName).creationCode`. * * Requirements: * * - `bytecode` must not be empty. * - `salt` must have not been used for `bytecode` already. * - the factory must have a balance of at least `amount`. * - if `amount` is non-zero, `bytecode` must have a `payable` constructor. */ function deploy(uint256 amount, bytes32 salt, bytes memory bytecode) internal returns (address addr) { if (address(this).balance < amount) { revert Create2InsufficientBalance(address(this).balance, amount); } if (bytecode.length == 0) { revert Create2EmptyBytecode(); } /// @solidity memory-safe-assembly assembly { addr := create2(amount, add(bytecode, 0x20), mload(bytecode), salt) } if (addr == address(0)) { revert Create2FailedDeployment(); } } /** * @dev Returns the address where a contract will be stored if deployed via {deploy}. Any change in the * `bytecodeHash` or `salt` will result in a new destination address. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash) internal view returns (address) { return computeAddress(salt, bytecodeHash, address(this)); } /** * @dev Returns the address where a contract will be stored if deployed via {deploy} from a contract located at * `deployer`. If `deployer` is this contract's address, returns the same value as {computeAddress}. */ function computeAddress(bytes32 salt, bytes32 bytecodeHash, address deployer) internal pure returns (address addr) { /// @solidity memory-safe-assembly assembly { let ptr := mload(0x40) // Get free memory pointer // | | ↓ ptr ... ↓ ptr + 0x0B (start) ... ↓ ptr + 0x20 ... ↓ ptr + 0x40 ... | // |-------------------|---------------------------------------------------------------------------| // | bytecodeHash | CCCCCCCCCCCCC...CC | // | salt | BBBBBBBBBBBBB...BB | // | deployer | 000000...0000AAAAAAAAAAAAAAAAAAA...AA | // | 0xFF | FF | // |-------------------|---------------------------------------------------------------------------| // | memory | 000000...00FFAAAAAAAAAAAAAAAAAAA...AABBBBBBBBBBBBB...BBCCCCCCCCCCCCC...CC | // | keccak(start, 85) | ↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑↑ | mstore(add(ptr, 0x40), bytecodeHash) mstore(add(ptr, 0x20), salt) mstore(ptr, deployer) // Right-aligned with 12 preceding garbage bytes let start := add(ptr, 0x0b) // The hashed data starts at the final garbage byte which we will set to 0xff mstore8(start, 0xff) addr := keccak256(start, 85) } } }
// 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/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 { ISwapFeePercentageBounds } from "@balancer-labs/v3-interfaces/contracts/vault/ISwapFeePercentageBounds.sol"; import { IUnbalancedLiquidityInvariantRatioBounds } from "@balancer-labs/v3-interfaces/contracts/vault/IUnbalancedLiquidityInvariantRatioBounds.sol"; import { IVaultErrors } from "@balancer-labs/v3-interfaces/contracts/vault/IVaultErrors.sol"; import { IBasePool } from "@balancer-labs/v3-interfaces/contracts/vault/IBasePool.sol"; import { IVault } from "@balancer-labs/v3-interfaces/contracts/vault/IVault.sol"; import { IWeightedPool, WeightedPoolDynamicData, WeightedPoolImmutableData } from "@balancer-labs/v3-interfaces/contracts/pool-weighted/IWeightedPool.sol"; import "@balancer-labs/v3-interfaces/contracts/vault/VaultTypes.sol"; import { InputHelpers } from "@balancer-labs/v3-solidity-utils/contracts/helpers/InputHelpers.sol"; import { WeightedMath } from "@balancer-labs/v3-solidity-utils/contracts/math/WeightedMath.sol"; import { BalancerPoolToken } from "@balancer-labs/v3-vault/contracts/BalancerPoolToken.sol"; import { FixedPoint } from "@balancer-labs/v3-solidity-utils/contracts/math/FixedPoint.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 Weighted Pool, with fixed weights. * @dev Weighted Pools are designed for uncorrelated assets, and use `WeightedMath` (from Balancer v1 and v2) * to compute the price curve. * * There can be up to 8 tokens in a weighted pool (same as v2), and the normalized weights (expressed as 18-decimal * floating point numbers), must sum to FixedPoint.ONE. Weights cannot be changed after deployment. * * The swap fee percentage is bounded by minimum and maximum values (same as were used in v2). */ contract WeightedPool is IWeightedPool, BalancerPoolToken, PoolInfo, Version { /// @dev Struct with data for deploying a new WeightedPool. `normalizedWeights` length must match `numTokens`. struct NewPoolParams { string name; string symbol; uint256 numTokens; uint256[] normalizedWeights; string version; } // 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 = 0.001e16; // 0.001% uint256 private constant _MAX_SWAP_FEE_PERCENTAGE = 10e16; // 10% // A minimum normalized weight imposes a maximum weight ratio. We need this due to limitations in the // implementation of the fixed point power function, as these ratios are often exponents. uint256 private constant _MIN_WEIGHT = 1e16; // 1% uint256 private immutable _totalTokens; uint256 internal immutable _normalizedWeight0; uint256 internal immutable _normalizedWeight1; uint256 internal immutable _normalizedWeight2; uint256 internal immutable _normalizedWeight3; uint256 internal immutable _normalizedWeight4; uint256 internal immutable _normalizedWeight5; uint256 internal immutable _normalizedWeight6; uint256 internal immutable _normalizedWeight7; /// @notice Indicates that one of the pool tokens' weight is below the minimum allowed. error MinWeight(); /// @notice Indicates that the sum of the pool tokens' weights is not FixedPoint.ONE. error NormalizedWeightInvariant(); /** * @notice `getRate` from `IRateProvider` was called on a Weighted Pool. * @dev It is not safe to nest Weighted Pools as WITH_RATE tokens in other pools, where they function as their own * rate provider. The default `getRate` implementation from `BalancerPoolToken` computes the BPT rate using the * invariant, which has a non-trivial (and non-linear) error. Without the ability to specify a rounding direction, * the rate could be manipulable. * * It is fine to nest Weighted Pools as STANDARD tokens, or to use them with external rate providers that are * stable and have at most 1 wei of rounding error (e.g., oracle-based). */ error WeightedPoolBptRateUnsupported(); constructor( NewPoolParams memory params, IVault vault ) BalancerPoolToken(vault, params.name, params.symbol) PoolInfo(vault) Version(params.version) { _totalTokens = params.numTokens; InputHelpers.ensureInputLengthMatch(_totalTokens, params.normalizedWeights.length); // Ensure each normalized weight is above the minimum. uint256 normalizedSum = 0; for (uint8 i = 0; i < _totalTokens; ++i) { uint256 normalizedWeight = params.normalizedWeights[i]; if (normalizedWeight < _MIN_WEIGHT) { revert MinWeight(); } normalizedSum = normalizedSum + normalizedWeight; // prettier-ignore if (i == 0) { _normalizedWeight0 = normalizedWeight; } else if (i == 1) { _normalizedWeight1 = normalizedWeight; } else if (i == 2) { _normalizedWeight2 = normalizedWeight; } else if (i == 3) { _normalizedWeight3 = normalizedWeight; } else if (i == 4) { _normalizedWeight4 = normalizedWeight; } else if (i == 5) { _normalizedWeight5 = normalizedWeight; } else if (i == 6) { _normalizedWeight6 = normalizedWeight; } else if (i == 7) { _normalizedWeight7 = normalizedWeight; } } // Ensure that the normalized weights sum to ONE. if (normalizedSum != FixedPoint.ONE) { revert NormalizedWeightInvariant(); } } /// @inheritdoc IBasePool function computeInvariant(uint256[] memory balancesLiveScaled18, Rounding rounding) public view returns (uint256) { function(uint256[] memory, uint256[] memory) internal pure returns (uint256) _upOrDown = rounding == Rounding.ROUND_UP ? WeightedMath.computeInvariantUp : WeightedMath.computeInvariantDown; return _upOrDown(_getNormalizedWeights(), balancesLiveScaled18); } /// @inheritdoc IBasePool function computeBalance( uint256[] memory balancesLiveScaled18, uint256 tokenInIndex, uint256 invariantRatio ) external view returns (uint256 newBalance) { return WeightedMath.computeBalanceOutGivenInvariant( balancesLiveScaled18[tokenInIndex], _getNormalizedWeight(tokenInIndex), invariantRatio ); } /// @inheritdoc IWeightedPool function getNormalizedWeights() external view returns (uint256[] memory) { return _getNormalizedWeights(); } /// @inheritdoc IBasePool function onSwap(PoolSwapParams memory request) public view onlyVault returns (uint256) { uint256 balanceTokenInScaled18 = request.balancesScaled18[request.indexIn]; uint256 balanceTokenOutScaled18 = request.balancesScaled18[request.indexOut]; if (request.kind == SwapKind.EXACT_IN) { uint256 amountOutScaled18 = WeightedMath.computeOutGivenExactIn( balanceTokenInScaled18, _getNormalizedWeight(request.indexIn), balanceTokenOutScaled18, _getNormalizedWeight(request.indexOut), request.amountGivenScaled18 ); return amountOutScaled18; } else { uint256 amountInScaled18 = WeightedMath.computeInGivenExactOut( balanceTokenInScaled18, _getNormalizedWeight(request.indexIn), balanceTokenOutScaled18, _getNormalizedWeight(request.indexOut), request.amountGivenScaled18 ); // Fees are added after scaling happens, to reduce the complexity of the rounding direction analysis. return amountInScaled18; } } function _getNormalizedWeight(uint256 tokenIndex) internal view virtual returns (uint256) { // prettier-ignore if (tokenIndex == 0) { return _normalizedWeight0; } else if (tokenIndex == 1) { return _normalizedWeight1; } else if (tokenIndex == 2) { return _normalizedWeight2; } else if (tokenIndex == 3) { return _normalizedWeight3; } else if (tokenIndex == 4) { return _normalizedWeight4; } else if (tokenIndex == 5) { return _normalizedWeight5; } else if (tokenIndex == 6) { return _normalizedWeight6; } else if (tokenIndex == 7) { return _normalizedWeight7; } else { revert IVaultErrors.InvalidToken(); } } function _getNormalizedWeights() internal view virtual returns (uint256[] memory) { uint256 totalTokens = _totalTokens; uint256[] memory normalizedWeights = new uint256[](totalTokens); // prettier-ignore { normalizedWeights[0] = _normalizedWeight0; normalizedWeights[1] = _normalizedWeight1; if (totalTokens > 2) { normalizedWeights[2] = _normalizedWeight2; } else { return normalizedWeights; } if (totalTokens > 3) { normalizedWeights[3] = _normalizedWeight3; } else { return normalizedWeights; } if (totalTokens > 4) { normalizedWeights[4] = _normalizedWeight4; } else { return normalizedWeights; } if (totalTokens > 5) { normalizedWeights[5] = _normalizedWeight5; } else { return normalizedWeights; } if (totalTokens > 6) { normalizedWeights[6] = _normalizedWeight6; } else { return normalizedWeights; } if (totalTokens > 7) { normalizedWeights[7] = _normalizedWeight7; } } return normalizedWeights; } /// @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 WeightedMath._MIN_INVARIANT_RATIO; } /// @inheritdoc IUnbalancedLiquidityInvariantRatioBounds function getMaximumInvariantRatio() external pure returns (uint256) { return WeightedMath._MAX_INVARIANT_RATIO; } /// @inheritdoc IWeightedPool function getWeightedPoolDynamicData() external view returns (WeightedPoolDynamicData memory data) { data.balancesLiveScaled18 = _vault.getCurrentLiveBalances(address(this)); (, data.tokenRates) = _vault.getPoolTokenRates(address(this)); data.staticSwapFeePercentage = _vault.getStaticSwapFeePercentage((address(this))); data.totalSupply = totalSupply(); PoolConfig memory poolConfig = _vault.getPoolConfig(address(this)); data.isPoolInitialized = poolConfig.isPoolInitialized; data.isPoolPaused = poolConfig.isPoolPaused; data.isPoolInRecoveryMode = poolConfig.isPoolInRecoveryMode; } /// @inheritdoc IWeightedPool function getWeightedPoolImmutableData() external view returns (WeightedPoolImmutableData memory data) { data.tokens = _vault.getPoolTokens(address(this)); (data.decimalScalingFactors, ) = _vault.getPoolTokenRates(address(this)); data.normalizedWeights = _getNormalizedWeights(); } /// @inheritdoc IRateProvider function getRate() public pure override returns (uint256) { revert WeightedPoolBptRateUnsupported(); } }
{ "viaIR": true, "evmVersion": "cancun", "optimizer": { "enabled": true, "runs": 9999, "details": { "yulDetails": { "optimizerSteps": "dhfoDgvulfnTUtnIf [ xa[r]EscLM cCTUtTOntnfDIul Lcul Vcul [j] Tpeul xa[rul] xa[r]cL gvif CTUca[r]LSsTFOtfDnca[r]Iulc ] jmul[jul] VcTOcul jmul : fDnTOcmu" } } }, "outputSelection": { "*": { "*": [ "evm.bytecode", "evm.deployedBytecode", "devdoc", "userdoc", "metadata", "abi" ] } }, "libraries": {} }
Contract Security Audit
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[{"inputs":[{"internalType":"contract IVault","name":"vault","type":"address"},{"internalType":"uint32","name":"pauseWindowDuration","type":"uint32"},{"internalType":"string","name":"factoryVersion","type":"string"},{"internalType":"string","name":"poolVersion","type":"string"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"Create2EmptyBytecode","type":"error"},{"inputs":[],"name":"Create2FailedDeployment","type":"error"},{"inputs":[{"internalType":"uint256","name":"balance","type":"uint256"},{"internalType":"uint256","name":"needed","type":"uint256"}],"name":"Create2InsufficientBalance","type":"error"},{"inputs":[],"name":"Disabled","type":"error"},{"inputs":[],"name":"IndexOutOfBounds","type":"error"},{"inputs":[],"name":"PoolPauseWindowDurationOverflow","type":"error"},{"inputs":[],"name":"SenderNotAllowed","type":"error"},{"inputs":[],"name":"StandardPoolWithCreator","type":"error"},{"anonymous":false,"inputs":[],"name":"FactoryDisabled","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"pool","type":"address"}],"name":"PoolCreated","type":"event"},{"inputs":[{"internalType":"string","name":"name","type":"string"},{"internalType":"string","name":"symbol","type":"string"},{"components":[{"internalType":"contract IERC20","name":"token","type":"address"},{"internalType":"enum TokenType","name":"tokenType","type":"uint8"},{"internalType":"contract IRateProvider","name":"rateProvider","type":"address"},{"internalType":"bool","name":"paysYieldFees","type":"bool"}],"internalType":"struct TokenConfig[]","name":"tokens","type":"tuple[]"},{"internalType":"uint256[]","name":"normalizedWeights","type":"uint256[]"},{"components":[{"internalType":"address","name":"pauseManager","type":"address"},{"internalType":"address","name":"swapFeeManager","type":"address"},{"internalType":"address","name":"poolCreator","type":"address"}],"internalType":"struct PoolRoleAccounts","name":"roleAccounts","type":"tuple"},{"internalType":"uint256","name":"swapFeePercentage","type":"uint256"},{"internalType":"address","name":"poolHooksContract","type":"address"},{"internalType":"bool","name":"enableDonation","type":"bool"},{"internalType":"bool","name":"disableUnbalancedLiquidity","type":"bool"},{"internalType":"bytes32","name":"salt","type":"bytes32"}],"name":"create","outputs":[{"internalType":"address","name":"pool","type":"address"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"disable","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"bytes4","name":"selector","type":"bytes4"}],"name":"getActionId","outputs":[{"internalType":"bytes32","name":"","type":"bytes32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getAuthorizer","outputs":[{"internalType":"contract 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LiquidityManagement","name":"liquidityManagement","type":"tuple"}],"stateMutability":"pure","type":"function"},{"inputs":[],"name":"getDefaultPoolHooksContract","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"pure","type":"function"},{"inputs":[{"internalType":"bytes","name":"constructorArgs","type":"bytes"},{"internalType":"bytes32","name":"salt","type":"bytes32"}],"name":"getDeploymentAddress","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getNewPoolPauseWindowEndTime","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getOriginalPauseWindowEndTime","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPauseWindowDuration","outputs":[{"internalType":"uint32","name":"","type":"uint32"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPoolCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPoolVersion","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getPools","outputs":[{"internalType":"address[]","name":"","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"start","type":"uint256"},{"internalType":"uint256","name":"count","type":"uint256"}],"name":"getPoolsInRange","outputs":[{"internalType":"address[]","name":"pools","type":"address[]"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"getVault","outputs":[{"internalType":"contract IVault","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"isDisabled","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"pool","type":"address"}],"name":"isPoolFromFactory","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"version","outputs":[{"internalType":"string","name":"","type":"string"}],"stateMutability":"view","type":"function"}]
Contract Creation Code
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Deployed Bytecode
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
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
-----Decoded View---------------
Arg [0] : vault (address): 0xbA1333333333a1BA1108E8412f11850A5C319bA9
Arg [1] : pauseWindowDuration (uint32): 124416000
Arg [2] : factoryVersion (string): {"name":"WeightedPoolFactory","version":1,"deployment":"20241205-v3-weighted-pool"}
Arg [3] : poolVersion (string): {"name":"WeightedPool","version":1,"deployment":"20241205-v3-weighted-pool"}
-----Encoded View---------------
12 Constructor Arguments found :
Arg [0] : 000000000000000000000000ba1333333333a1ba1108e8412f11850a5c319ba9
Arg [1] : 00000000000000000000000000000000000000000000000000000000076a7000
Arg [2] : 0000000000000000000000000000000000000000000000000000000000000080
Arg [3] : 0000000000000000000000000000000000000000000000000000000000000100
Arg [4] : 0000000000000000000000000000000000000000000000000000000000000053
Arg [5] : 7b226e616d65223a225765696768746564506f6f6c466163746f7279222c2276
Arg [6] : 657273696f6e223a312c226465706c6f796d656e74223a223230323431323035
Arg [7] : 2d76332d77656967687465642d706f6f6c227d00000000000000000000000000
Arg [8] : 000000000000000000000000000000000000000000000000000000000000004c
Arg [9] : 7b226e616d65223a225765696768746564506f6f6c222c2276657273696f6e22
Arg [10] : 3a312c226465706c6f796d656e74223a2232303234313230352d76332d776569
Arg [11] : 67687465642d706f6f6c227d0000000000000000000000000000000000000000
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Multichain Portfolio | 30 Chains
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A contract address hosts a smart contract, which is a set of code stored on the blockchain that runs when predetermined conditions are met. Learn more about addresses in our Knowledge Base.