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Contract Name:
Minter
Compiler Version
v0.8.19+commit.7dd6d404
Contract Source Code (Solidity)
/**
*Submitted for verification at SonicScan.org on 2024-12-18
*/
// SPDX-License-Identifier: GPL-3.0-or-later
// Hydrometer combines powerful liquidity incentives, low slippage, and a vote-locked governance model using $HYDRO and $veHYDRO tokens, ensuring an innovative and decentralized experience for all users.
//https://x.com/Hydrometer_Fi
pragma solidity 0.8.19;
// OpenZeppelin Contracts (last updated v4.8.0) (utils/math/Math.sol)
/**
* @dev Standard math utilities missing in the Solidity language.
*/
library Math {
enum Rounding {
Down, // Toward negative infinity
Up, // Toward infinity
Zero // Toward zero
}
/**
* @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 up instead
* of rounding down.
*/
function ceilDiv(uint256 a, uint256 b) internal pure returns (uint256) {
// (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; // Least significant 256 bits of the product
uint256 prod1; // Most significant 256 bits of the product
assembly {
let mm := mulmod(x, y, not(0))
prod0 := mul(x, y)
prod1 := sub(sub(mm, prod0), lt(mm, prod0))
}
// Handle non-overflow cases, 256 by 256 division.
if (prod1 == 0) {
return prod0 / denominator;
}
// Make sure the result is less than 2^256. Also prevents denominator == 0.
require(denominator > prod1, "Math: mulDiv overflow");
///////////////////////////////////////////////
// 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.
// Does not overflow because the denominator cannot be zero at this stage in the function.
uint256 twos = denominator & (~denominator + 1);
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 (rounding == Rounding.Up && 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 down.
*
* 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 + (rounding == Rounding.Up && result * result < a ? 1 : 0);
}
}
/**
* @dev Return the log in base 2, rounded down, of a positive value.
* 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 + (rounding == Rounding.Up && 1 << result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 10, rounded down, of a positive value.
* 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 + (rounding == Rounding.Up && 10 ** result < value ? 1 : 0);
}
}
/**
* @dev Return the log in base 256, rounded down, of a positive value.
* 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 + (rounding == Rounding.Up && 1 << (result << 3) < value ? 1 : 0);
}
}
}
// OpenZeppelin Contracts (last updated v4.6.0) (token/ERC20/IERC20.sol)
/**
* @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 amount of tokens in existence.
*/
function totalSupply() external view returns (uint256);
/**
* @dev Returns the amount of tokens owned by `account`.
*/
function balanceOf(address account) external view returns (uint256);
/**
* @dev Moves `amount` 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 amount) 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 `amount` 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 amount) external returns (bool);
/**
* @dev Moves `amount` tokens from `from` to `to` using the
* allowance mechanism. `amount` 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 amount) external returns (bool);
}
interface IHydro is IERC20 {
error NotMinter();
error NotOwner();
/// @notice Mint an amount of tokens to an account
/// Only callable by Minter.sol
/// @return True if success
function mint(address account, uint256 amount) external returns (bool);
/// @notice Address of Minter.sol
function minter() external view returns (address);
}
interface IVoter {
error AlreadyVotedOrDeposited();
error DistributeWindow();
error FactoryPathNotApproved();
error GaugeAlreadyKilled();
error GaugeAlreadyRevived();
error GaugeExists();
error GaugeDoesNotExist(address _pool);
error GaugeNotAlive(address _gauge);
error InactiveManagedNFT();
error MaximumVotingNumberTooLow();
error NonZeroVotes();
error NotAPool();
error NotApprovedOrOwner();
error NotGovernor();
error NotEmergencyCouncil();
error NotMinter();
error NotWhitelistedNFT();
error NotWhitelistedToken();
error SameValue();
error SpecialVotingWindow();
error TooManyPools();
error UnequalLengths();
error ZeroBalance();
error ZeroAddress();
event GaugeCreated(
address indexed poolFactory,
address indexed votingRewardsFactory,
address indexed gaugeFactory,
address pool,
address bribeVotingReward,
address feeVotingReward,
address gauge,
address creator
);
event GaugeKilled(address indexed gauge);
event GaugeRevived(address indexed gauge);
event Voted(
address indexed voter,
address indexed pool,
uint256 indexed tokenId,
uint256 weight,
uint256 totalWeight,
uint256 timestamp
);
event Abstained(
address indexed voter,
address indexed pool,
uint256 indexed tokenId,
uint256 weight,
uint256 totalWeight,
uint256 timestamp
);
event NotifyReward(address indexed sender, address indexed reward, uint256 amount);
event DistributeReward(address indexed sender, address indexed gauge, uint256 amount);
event WhitelistToken(address indexed whitelister, address indexed token, bool indexed _bool);
event WhitelistNFT(address indexed whitelister, uint256 indexed tokenId, bool indexed _bool);
/// @notice Store trusted forwarder address to pass into factories
function forwarder() external view returns (address);
/// @notice The ve token that governs these contracts
function ve() external view returns (address);
/// @notice Factory registry for valid pool / gauge / rewards factories
function factoryRegistry() external view returns (address);
/// @notice Address of Minter.sol
function minter() external view returns (address);
/// @notice Standard OZ IGovernor using ve for vote weights.
function governor() external view returns (address);
/// @notice Custom Epoch Governor using ve for vote weights.
function epochGovernor() external view returns (address);
/// @notice credibly neutral party similar to Curve's Emergency DAO
function emergencyCouncil() external view returns (address);
/// @dev Total Voting Weights
function totalWeight() external view returns (uint256);
/// @dev Most number of pools one voter can vote for at once
function maxVotingNum() external view returns (uint256);
// mappings
/// @dev Pool => Gauge
function gauges(address pool) external view returns (address);
/// @dev Gauge => Pool
function poolForGauge(address gauge) external view returns (address);
/// @dev Gauge => Fees Voting Reward
function gaugeToFees(address gauge) external view returns (address);
/// @dev Gauge => Bribes Voting Reward
function gaugeToBribe(address gauge) external view returns (address);
/// @dev Pool => Weights
function weights(address pool) external view returns (uint256);
/// @dev NFT => Pool => Votes
function votes(uint256 tokenId, address pool) external view returns (uint256);
/// @dev NFT => Total voting weight of NFT
function usedWeights(uint256 tokenId) external view returns (uint256);
/// @dev Nft => Timestamp of last vote (ensures single vote per epoch)
function lastVoted(uint256 tokenId) external view returns (uint256);
/// @dev Address => Gauge
function isGauge(address) external view returns (bool);
/// @dev Token => Whitelisted status
function isWhitelistedToken(address token) external view returns (bool);
/// @dev TokenId => Whitelisted status
function isWhitelistedNFT(uint256 tokenId) external view returns (bool);
/// @dev Gauge => Liveness status
function isAlive(address gauge) external view returns (bool);
/// @dev Gauge => Amount claimable
function claimable(address gauge) external view returns (uint256);
/// @notice Number of pools with a Gauge
function length() external view returns (uint256);
/// @notice Called by Minter to distribute weekly emissions rewards for disbursement amongst gauges.
/// @dev Assumes totalWeight != 0 (Will never be zero as long as users are voting).
/// Throws if not called by minter.
/// @param _amount Amount of rewards to distribute.
function notifyRewardAmount(uint256 _amount) external;
/// @dev Utility to distribute to gauges of pools in range _start to _finish.
/// @param _start Starting index of gauges to distribute to.
/// @param _finish Ending index of gauges to distribute to.
function distribute(uint256 _start, uint256 _finish) external;
/// @dev Utility to distribute to gauges of pools in array.
/// @param _gauges Array of gauges to distribute to.
function distribute(address[] memory _gauges) external;
/// @notice Called by users to update voting balances in voting rewards contracts.
/// @param _tokenId Id of veNFT whose balance you wish to update.
function poke(uint256 _tokenId) external;
/// @notice Called by users to vote for pools. Votes distributed proportionally based on weights.
/// Can only vote or deposit into a managed NFT once per epoch.
/// Can only vote for gauges that have not been killed.
/// @dev Weights are distributed proportional to the sum of the weights in the array.
/// Throws if length of _poolVote and _weights do not match.
/// @param _tokenId Id of veNFT you are voting with.
/// @param _poolVote Array of pools you are voting for.
/// @param _weights Weights of pools.
function vote(uint256 _tokenId, address[] calldata _poolVote, uint256[] calldata _weights) external;
/// @notice Called by users to reset voting state. Required if you wish to make changes to
/// veNFT state (e.g. merge, split, deposit into managed etc).
/// Cannot reset in the same epoch that you voted in.
/// Can vote or deposit into a managed NFT again after reset.
/// @param _tokenId Id of veNFT you are reseting.
function reset(uint256 _tokenId) external;
/// @notice Called by users to deposit into a managed NFT.
/// Can only vote or deposit into a managed NFT once per epoch.
/// Note that NFTs deposited into a managed NFT will be re-locked
/// to the maximum lock time on withdrawal.
/// @dev Throws if not approved or owner.
/// Throws if managed NFT is inactive.
/// Throws if depositing within privileged window (one hour prior to epoch flip).
function depositManaged(uint256 _tokenId, uint256 _mTokenId) external;
/// @notice Called by users to withdraw from a managed NFT.
/// Cannot do it in the same epoch that you deposited into a managed NFT.
/// Can vote or deposit into a managed NFT again after withdrawing.
/// Note that the NFT withdrawn is re-locked to the maximum lock time.
function withdrawManaged(uint256 _tokenId) external;
/// @notice Claim emissions from gauges.
/// @param _gauges Array of gauges to collect emissions from.
function claimRewards(address[] memory _gauges) external;
/// @notice Claim bribes for a given NFT.
/// @dev Utility to help batch bribe claims.
/// @param _bribes Array of BribeVotingReward contracts to collect from.
/// @param _tokens Array of tokens that are used as bribes.
/// @param _tokenId Id of veNFT that you wish to claim bribes for.
function claimBribes(address[] memory _bribes, address[][] memory _tokens, uint256 _tokenId) external;
/// @notice Claim fees for a given NFT.
/// @dev Utility to help batch fee claims.
/// @param _fees Array of FeesVotingReward contracts to collect from.
/// @param _tokens Array of tokens that are used as fees.
/// @param _tokenId Id of veNFT that you wish to claim fees for.
function claimFees(address[] memory _fees, address[][] memory _tokens, uint256 _tokenId) external;
/// @notice Set new governor.
/// @dev Throws if not called by governor.
/// @param _governor .
function setGovernor(address _governor) external;
/// @notice Set new epoch based governor.
/// @dev Throws if not called by governor.
/// @param _epochGovernor .
function setEpochGovernor(address _epochGovernor) external;
/// @notice Set new emergency council.
/// @dev Throws if not called by emergency council.
/// @param _emergencyCouncil .
function setEmergencyCouncil(address _emergencyCouncil) external;
/// @notice Set maximum number of gauges that can be voted for.
/// @dev Throws if not called by governor.
/// Throws if _maxVotingNum is too low.
/// Throws if the values are the same.
/// @param _maxVotingNum .
function setMaxVotingNum(uint256 _maxVotingNum) external;
/// @notice Whitelist (or unwhitelist) token for use in bribes.
/// @dev Throws if not called by governor.
/// @param _token .
/// @param _bool .
function whitelistToken(address _token, bool _bool) external;
/// @notice Whitelist (or unwhitelist) token id for voting in last hour prior to epoch flip.
/// @dev Throws if not called by governor.
/// Throws if already whitelisted.
/// @param _tokenId .
/// @param _bool .
function whitelistNFT(uint256 _tokenId, bool _bool) external;
/// @notice Create a new gauge (unpermissioned).
/// @dev Governor can create a new gauge for a pool with any address.
/// @param _poolFactory .
/// @param _pool .
function createGauge(address _poolFactory, address _pool) external returns (address);
/// @notice Kills a gauge. The gauge will not receive any new emissions and cannot be deposited into.
/// Can still withdraw from gauge.
/// @dev Throws if not called by emergency council.
/// Throws if gauge already killed.
/// @param _gauge .
function killGauge(address _gauge) external;
/// @notice Revives a killed gauge. Gauge will can receive emissions and deposits again.
/// @dev Throws if not called by emergency council.
/// Throws if gauge is not killed.
/// @param _gauge .
function reviveGauge(address _gauge) external;
/// @dev Update claims to emissions for an array of gauges.
/// @param _gauges Array of gauges to update emissions for.
function updateFor(address[] memory _gauges) external;
/// @dev Update claims to emissions for gauges based on their pool id as stored in Voter.
/// @param _start Starting index of pools.
/// @param _end Ending index of pools.
function updateFor(uint256 _start, uint256 _end) external;
/// @dev Update claims to emissions for single gauge
/// @param _gauge .
function updateFor(address _gauge) external;
}
// OpenZeppelin Contracts v4.4.1 (token/ERC721/extensions/IERC721Metadata.sol)
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC721/IERC721.sol)
// OpenZeppelin Contracts v4.4.1 (utils/introspection/IERC165.sol)
/**
* @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);
}
/**
* @dev Required interface of an ERC721 compliant contract.
*/
interface IERC721 is IERC165 {
/**
* @dev Emitted when `tokenId` token is transferred from `from` to `to`.
*/
event Transfer(address indexed from, address indexed to, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables `approved` to manage the `tokenId` token.
*/
event Approval(address indexed owner, address indexed approved, uint256 indexed tokenId);
/**
* @dev Emitted when `owner` enables or disables (`approved`) `operator` to manage all of its assets.
*/
event ApprovalForAll(address indexed owner, address indexed operator, bool approved);
/**
* @dev Returns the number of tokens in ``owner``'s account.
*/
function balanceOf(address owner) external view returns (uint256 balance);
/**
* @dev Returns the owner of the `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function ownerOf(uint256 tokenId) external view returns (address owner);
/**
* @dev Safely transfers `tokenId` token from `from` to `to`.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
/**
* @dev Safely transfers `tokenId` token from `from` to `to`, checking first that contract recipients
* are aware of the ERC721 protocol to prevent tokens from being forever locked.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must exist and be owned by `from`.
* - If the caller is not `from`, it must have been allowed to move this token by either {approve} or {setApprovalForAll}.
* - If `to` refers to a smart contract, it must implement {IERC721Receiver-onERC721Received}, which is called upon a safe transfer.
*
* Emits a {Transfer} event.
*/
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Transfers `tokenId` token from `from` to `to`.
*
* WARNING: Note that the caller is responsible to confirm that the recipient is capable of receiving ERC721
* or else they may be permanently lost. Usage of {safeTransferFrom} prevents loss, though the caller must
* understand this adds an external call which potentially creates a reentrancy vulnerability.
*
* Requirements:
*
* - `from` cannot be the zero address.
* - `to` cannot be the zero address.
* - `tokenId` token must be owned by `from`.
* - If the caller is not `from`, it must be approved to move this token by either {approve} or {setApprovalForAll}.
*
* Emits a {Transfer} event.
*/
function transferFrom(address from, address to, uint256 tokenId) external;
/**
* @dev Gives permission to `to` to transfer `tokenId` token to another account.
* The approval is cleared when the token is transferred.
*
* Only a single account can be approved at a time, so approving the zero address clears previous approvals.
*
* Requirements:
*
* - The caller must own the token or be an approved operator.
* - `tokenId` must exist.
*
* Emits an {Approval} event.
*/
function approve(address to, uint256 tokenId) external;
/**
* @dev Approve or remove `operator` as an operator for the caller.
* Operators can call {transferFrom} or {safeTransferFrom} for any token owned by the caller.
*
* Requirements:
*
* - The `operator` cannot be the caller.
*
* Emits an {ApprovalForAll} event.
*/
function setApprovalForAll(address operator, bool approved) external;
/**
* @dev Returns the account approved for `tokenId` token.
*
* Requirements:
*
* - `tokenId` must exist.
*/
function getApproved(uint256 tokenId) external view returns (address operator);
/**
* @dev Returns if the `operator` is allowed to manage all of the assets of `owner`.
*
* See {setApprovalForAll}
*/
function isApprovedForAll(address owner, address operator) external view returns (bool);
}
/**
* @title ERC-721 Non-Fungible Token Standard, optional metadata extension
* @dev See https://eips.ethereum.org/EIPS/eip-721
*/
interface IERC721Metadata is IERC721 {
/**
* @dev Returns the token collection name.
*/
function name() external view returns (string memory);
/**
* @dev Returns the token collection symbol.
*/
function symbol() external view returns (string memory);
/**
* @dev Returns the Uniform Resource Identifier (URI) for `tokenId` token.
*/
function tokenURI(uint256 tokenId) external view returns (string memory);
}
// OpenZeppelin Contracts (interfaces/IERC6372.sol)
interface IERC6372 {
/**
* @dev Clock used for flagging checkpoints. Can be overridden to implement timestamp based checkpoints (and voting).
*/
function clock() external view returns (uint48);
/**
* @dev Description of the clock
*/
// solhint-disable-next-line func-name-mixedcase
function CLOCK_MODE() external view returns (string memory);
}
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC165.sol)
// OpenZeppelin Contracts v4.4.1 (interfaces/IERC721.sol)
/// @title EIP-721 Metadata Update Extension
interface IERC4906 is IERC165, IERC721 {
/// @dev This event emits when the metadata of a token is changed.
/// So that the third-party platforms such as NFT market could
/// timely update the images and related attributes of the NFT.
event MetadataUpdate(uint256 _tokenId);
/// @dev This event emits when the metadata of a range of tokens is changed.
/// So that the third-party platforms such as NFT market could
/// timely update the images and related attributes of the NFTs.
event BatchMetadataUpdate(uint256 _fromTokenId, uint256 _toTokenId);
}
/// Modified IVotes interface for tokenId based voting
interface IVotes {
/**
* @dev Emitted when an account changes their delegate.
*/
event DelegateChanged(address indexed delegator, uint256 indexed fromDelegate, uint256 indexed toDelegate);
/**
* @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
*/
event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
/**
* @dev Returns the amount of votes that `tokenId` had at a specific moment in the past.
* If the account passed in is not the owner, returns 0.
*/
function getPastVotes(address account, uint256 tokenId, uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the total supply of votes available at a specific moment in the past. If the `clock()` is
* configured to use block numbers, this will return the value the end of the corresponding block.
*
* NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
* Votes that have not been delegated are still part of total supply, even though they would not participate in a
* vote.
*/
function getPastTotalSupply(uint256 timepoint) external view returns (uint256);
/**
* @dev Returns the delegate that `tokenId` has chosen. Can never be equal to the delegator's `tokenId`.
* Returns 0 if not delegated.
*/
function delegates(uint256 tokenId) external view returns (uint256);
/**
* @dev Delegates votes from the sender to `delegatee`.
*/
function delegate(uint256 delegator, uint256 delegatee) external;
/**
* @dev Delegates votes from `delegator` to `delegatee`. Signer must own `delegator`.
*/
function delegateBySig(
uint256 delegator,
uint256 delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external;
}
interface IVotingEscrow is IVotes, IERC4906, IERC6372, IERC721Metadata {
struct LockedBalance {
int128 amount;
uint256 end;
bool isPermanent;
}
struct UserPoint {
int128 bias;
int128 slope; // # -dweight / dt
uint256 ts;
uint256 blk; // block
uint256 permanent;
}
struct GlobalPoint {
int128 bias;
int128 slope; // # -dweight / dt
uint256 ts;
uint256 blk; // block
uint256 permanentLockBalance;
}
/// @notice A checkpoint for recorded delegated voting weights at a certain timestamp
struct Checkpoint {
uint256 fromTimestamp;
address owner;
uint256 delegatedBalance;
uint256 delegatee;
}
enum DepositType {
DEPOSIT_FOR_TYPE,
CREATE_LOCK_TYPE,
INCREASE_LOCK_AMOUNT,
INCREASE_UNLOCK_TIME
}
/// @dev Different types of veNFTs:
/// NORMAL - typical veNFT
/// LOCKED - veNFT which is locked into a MANAGED veNFT
/// MANAGED - veNFT which can accept the deposit of NORMAL veNFTs
enum EscrowType {
NORMAL,
LOCKED,
MANAGED
}
error AlreadyVoted();
error AmountTooBig();
error ERC721ReceiverRejectedTokens();
error ERC721TransferToNonERC721ReceiverImplementer();
error InvalidNonce();
error InvalidSignature();
error InvalidSignatureS();
error InvalidManagedNFTId();
error LockDurationNotInFuture();
error LockDurationTooLong();
error LockExpired();
error LockNotExpired();
error NoLockFound();
error NonExistentToken();
error NotApprovedOrOwner();
error NotDistributor();
error NotEmergencyCouncilOrGovernor();
error NotGovernor();
error NotGovernorOrManager();
error NotManagedNFT();
error NotManagedOrNormalNFT();
error NotLockedNFT();
error NotNormalNFT();
error NotPermanentLock();
error NotOwner();
error NotTeam();
error NotVoter();
error OwnershipChange();
error PermanentLock();
error SameAddress();
error SameNFT();
error SameState();
error SplitNoOwner();
error SplitNotAllowed();
error SignatureExpired();
error TooManyTokenIDs();
error ZeroAddress();
error ZeroAmount();
error ZeroBalance();
event Deposit(
address indexed provider,
uint256 indexed tokenId,
DepositType indexed depositType,
uint256 value,
uint256 locktime,
uint256 ts
);
event Withdraw(address indexed provider, uint256 indexed tokenId, uint256 value, uint256 ts);
event LockPermanent(address indexed _owner, uint256 indexed _tokenId, uint256 amount, uint256 _ts);
event UnlockPermanent(address indexed _owner, uint256 indexed _tokenId, uint256 amount, uint256 _ts);
event Supply(uint256 prevSupply, uint256 supply);
event Merge(
address indexed _sender,
uint256 indexed _from,
uint256 indexed _to,
uint256 _amountFrom,
uint256 _amountTo,
uint256 _amountFinal,
uint256 _locktime,
uint256 _ts
);
event Split(
uint256 indexed _from,
uint256 indexed _tokenId1,
uint256 indexed _tokenId2,
address _sender,
uint256 _splitAmount1,
uint256 _splitAmount2,
uint256 _locktime,
uint256 _ts
);
event CreateManaged(
address indexed _to,
uint256 indexed _mTokenId,
address indexed _from,
address _lockedManagedReward,
address _freeManagedReward
);
event DepositManaged(
address indexed _owner,
uint256 indexed _tokenId,
uint256 indexed _mTokenId,
uint256 _weight,
uint256 _ts
);
event WithdrawManaged(
address indexed _owner,
uint256 indexed _tokenId,
uint256 indexed _mTokenId,
uint256 _weight,
uint256 _ts
);
event SetAllowedManager(address indexed _allowedManager);
// State variables
/// @notice Address of Meta-tx Forwarder
function forwarder() external view returns (address);
/// @notice Address of FactoryRegistry.sol
function factoryRegistry() external view returns (address);
/// @notice Address of token (HYDRO) used to create a veNFT
function token() external view returns (address);
/// @notice Address of RewardsDistributor.sol
function distributor() external view returns (address);
/// @notice Address of Voter.sol
function voter() external view returns (address);
/// @notice Address of Protocol Team multisig
function team() external view returns (address);
/// @notice Address of art proxy used for on-chain art generation
function artProxy() external view returns (address);
/// @dev address which can create managed NFTs
function allowedManager() external view returns (address);
/// @dev Current count of token
function tokenId() external view returns (uint256);
/*///////////////////////////////////////////////////////////////
MANAGED NFT STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping of token id to escrow type
/// Takes advantage of the fact default value is EscrowType.NORMAL
function escrowType(uint256 tokenId) external view returns (EscrowType);
/// @dev Mapping of token id to managed id
function idToManaged(uint256 tokenId) external view returns (uint256 managedTokenId);
/// @dev Mapping of user token id to managed token id to weight of token id
function weights(uint256 tokenId, uint256 managedTokenId) external view returns (uint256 weight);
/// @dev Mapping of managed id to deactivated state
function deactivated(uint256 tokenId) external view returns (bool inactive);
/// @dev Mapping from managed nft id to locked managed rewards
/// `token` denominated rewards (rebases/rewards) stored in locked managed rewards contract
/// to prevent co-mingling of assets
function managedToLocked(uint256 tokenId) external view returns (address);
/// @dev Mapping from managed nft id to free managed rewards contract
/// these rewards can be freely withdrawn by users
function managedToFree(uint256 tokenId) external view returns (address);
/*///////////////////////////////////////////////////////////////
MANAGED NFT LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Create managed NFT (a permanent lock) for use within ecosystem.
/// @dev Throws if address already owns a managed NFT.
/// @return _mTokenId managed token id.
function createManagedLockFor(address _to) external returns (uint256 _mTokenId);
/// @notice Delegates balance to managed nft
/// Note that NFTs deposited into a managed NFT will be re-locked
/// to the maximum lock time on withdrawal.
/// Permanent locks that are deposited will automatically unlock.
/// @dev Managed nft will remain max-locked as long as there is at least one
/// deposit or withdrawal per week.
/// Throws if deposit nft is managed.
/// Throws if recipient nft is not managed.
/// Throws if deposit nft is already locked.
/// Throws if not called by voter.
/// @param _tokenId tokenId of NFT being deposited
/// @param _mTokenId tokenId of managed NFT that will receive the deposit
function depositManaged(uint256 _tokenId, uint256 _mTokenId) external;
/// @notice Retrieves locked rewards and withdraws balance from managed nft.
/// Note that the NFT withdrawn is re-locked to the maximum lock time.
/// @dev Throws if NFT not locked.
/// Throws if not called by voter.
/// @param _tokenId tokenId of NFT being deposited.
function withdrawManaged(uint256 _tokenId) external;
/// @notice Permit one address to call createManagedLockFor() that is not Voter.governor()
function setAllowedManager(address _allowedManager) external;
/// @notice Set Managed NFT state. Inactive NFTs cannot be deposited into.
/// @param _mTokenId managed nft state to set
/// @param _state true => inactive, false => active
function setManagedState(uint256 _mTokenId, bool _state) external;
/*///////////////////////////////////////////////////////////////
METADATA STORAGE
//////////////////////////////////////////////////////////////*/
function name() external view returns (string memory);
function symbol() external view returns (string memory);
function version() external view returns (string memory);
function decimals() external view returns (uint8);
function setTeam(address _team) external;
function setArtProxy(address _proxy) external;
/// @inheritdoc IERC721Metadata
function tokenURI(uint256 tokenId) external view returns (string memory);
/*//////////////////////////////////////////////////////////////
ERC721 BALANCE/OWNER STORAGE
//////////////////////////////////////////////////////////////*/
/// @dev Mapping from owner address to mapping of index to tokenId
function ownerToNFTokenIdList(address _owner, uint256 _index) external view returns (uint256 _tokenId);
/// @inheritdoc IERC721
function ownerOf(uint256 tokenId) external view returns (address owner);
/// @inheritdoc IERC721
function balanceOf(address owner) external view returns (uint256 balance);
/*//////////////////////////////////////////////////////////////
ERC721 APPROVAL STORAGE
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC721
function getApproved(uint256 _tokenId) external view returns (address operator);
/// @inheritdoc IERC721
function isApprovedForAll(address owner, address operator) external view returns (bool);
/// @notice Check whether spender is owner or an approved user for a given veNFT
/// @param _spender .
/// @param _tokenId .
function isApprovedOrOwner(address _spender, uint256 _tokenId) external returns (bool);
/*//////////////////////////////////////////////////////////////
ERC721 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC721
function approve(address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function setApprovalForAll(address operator, bool approved) external;
/// @inheritdoc IERC721
function transferFrom(address from, address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function safeTransferFrom(address from, address to, uint256 tokenId) external;
/// @inheritdoc IERC721
function safeTransferFrom(address from, address to, uint256 tokenId, bytes calldata data) external;
/*//////////////////////////////////////////////////////////////
ERC165 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC165
function supportsInterface(bytes4 _interfaceID) external view returns (bool);
/*//////////////////////////////////////////////////////////////
ESCROW STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice Total count of epochs witnessed since contract creation
function epoch() external view returns (uint256);
/// @notice Total amount of token() deposited
function supply() external view returns (uint256);
/// @notice Aggregate permanent locked balances
function permanentLockBalance() external view returns (uint256);
function userPointEpoch(uint256 _tokenId) external view returns (uint256 _epoch);
/// @notice time -> signed slope change
function slopeChanges(uint256 _timestamp) external view returns (int128);
/// @notice account -> can split
function canSplit(address _account) external view returns (bool);
/// @notice Global point history at a given index
function pointHistory(uint256 _loc) external view returns (GlobalPoint memory);
/// @notice Get the LockedBalance (amount, end) of a _tokenId
/// @param _tokenId .
/// @return LockedBalance of _tokenId
function locked(uint256 _tokenId) external view returns (LockedBalance memory);
/// @notice User -> UserPoint[userEpoch]
function userPointHistory(uint256 _tokenId, uint256 _loc) external view returns (UserPoint memory);
/*//////////////////////////////////////////////////////////////
ESCROW LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice Record global data to checkpoint
function checkpoint() external;
/// @notice Deposit `_value` tokens for `_tokenId` and add to the lock
/// @dev Anyone (even a smart contract) can deposit for someone else, but
/// cannot extend their locktime and deposit for a brand new user
/// @param _tokenId lock NFT
/// @param _value Amount to add to user's lock
function depositFor(uint256 _tokenId, uint256 _value) external;
/// @notice Deposit `_value` tokens for `msg.sender` and lock for `_lockDuration`
/// @param _value Amount to deposit
/// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week)
/// @return TokenId of created veNFT
function createLock(uint256 _value, uint256 _lockDuration) external returns (uint256);
/// @notice Deposit `_value` tokens for `_to` and lock for `_lockDuration`
/// @param _value Amount to deposit
/// @param _lockDuration Number of seconds to lock tokens for (rounded down to nearest week)
/// @param _to Address to deposit
/// @return TokenId of created veNFT
function createLockFor(uint256 _value, uint256 _lockDuration, address _to) external returns (uint256);
/// @notice Deposit `_value` additional tokens for `_tokenId` without modifying the unlock time
/// @param _value Amount of tokens to deposit and add to the lock
function increaseAmount(uint256 _tokenId, uint256 _value) external;
/// @notice Extend the unlock time for `_tokenId`
/// Cannot extend lock time of permanent locks
/// @param _lockDuration New number of seconds until tokens unlock
function increaseUnlockTime(uint256 _tokenId, uint256 _lockDuration) external;
/// @notice Withdraw all tokens for `_tokenId`
/// @dev Only possible if the lock is both expired and not permanent
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
function withdraw(uint256 _tokenId) external;
/// @notice Merges `_from` into `_to`.
/// @dev Cannot merge `_from` locks that are permanent or have already voted this epoch.
/// Cannot merge `_to` locks that have already expired.
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
/// @param _from VeNFT to merge from.
/// @param _to VeNFT to merge into.
function merge(uint256 _from, uint256 _to) external;
/// @notice Splits veNFT into two new veNFTS - one with oldLocked.amount - `_amount`, and the second with `_amount`
/// @dev This burns the tokenId of the target veNFT
/// Callable by approved or owner
/// If this is called by approved, approved will not have permissions to manipulate the newly created veNFTs
/// Returns the two new split veNFTs to owner
/// If `from` is permanent, will automatically dedelegate.
/// This will burn the veNFT. Any rebases or rewards that are unclaimed
/// will no longer be claimable. Claim all rebases and rewards prior to calling this.
/// @param _from VeNFT to split.
/// @param _amount Amount to split from veNFT.
/// @return _tokenId1 Return tokenId of veNFT with oldLocked.amount - `_amount`.
/// @return _tokenId2 Return tokenId of veNFT with `_amount`.
function split(uint256 _from, uint256 _amount) external returns (uint256 _tokenId1, uint256 _tokenId2);
/// @notice Toggle split for a specific address.
/// @dev Toggle split for address(0) to enable or disable for all.
/// @param _account Address to toggle split permissions
/// @param _bool True to allow, false to disallow
function toggleSplit(address _account, bool _bool) external;
/// @notice Permanently lock a veNFT. Voting power will be equal to
/// `LockedBalance.amount` with no decay. Required to delegate.
/// @dev Only callable by unlocked normal veNFTs.
/// @param _tokenId tokenId to lock.
function lockPermanent(uint256 _tokenId) external;
/// @notice Unlock a permanently locked veNFT. Voting power will decay.
/// Will automatically dedelegate if delegated.
/// @dev Only callable by permanently locked veNFTs.
/// Cannot unlock if already voted this epoch.
/// @param _tokenId tokenId to unlock.
function unlockPermanent(uint256 _tokenId) external;
/*///////////////////////////////////////////////////////////////
GAUGE VOTING STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice Get the voting power for _tokenId at the current timestamp
/// @dev Returns 0 if called in the same block as a transfer.
/// @param _tokenId .
/// @return Voting power
function balanceOfNFT(uint256 _tokenId) external view returns (uint256);
/// @notice Get the voting power for _tokenId at a given timestamp
/// @param _tokenId .
/// @param _t Timestamp to query voting power
/// @return Voting power
function balanceOfNFTAt(uint256 _tokenId, uint256 _t) external view returns (uint256);
/// @notice Calculate total voting power at current timestamp
/// @return Total voting power at current timestamp
function totalSupply() external view returns (uint256);
/// @notice Calculate total voting power at a given timestamp
/// @param _t Timestamp to query total voting power
/// @return Total voting power at given timestamp
function totalSupplyAt(uint256 _t) external view returns (uint256);
/*///////////////////////////////////////////////////////////////
GAUGE VOTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @notice See if a queried _tokenId has actively voted
/// @param _tokenId .
/// @return True if voted, else false
function voted(uint256 _tokenId) external view returns (bool);
/// @notice Set the global state voter and distributor
/// @dev This is only called once, at setup
function setVoterAndDistributor(address _voter, address _distributor) external;
/// @notice Set `voted` for _tokenId to true or false
/// @dev Only callable by voter
/// @param _tokenId .
/// @param _voted .
function voting(uint256 _tokenId, bool _voted) external;
/*///////////////////////////////////////////////////////////////
DAO VOTING STORAGE
//////////////////////////////////////////////////////////////*/
/// @notice The number of checkpoints for each tokenId
function numCheckpoints(uint256 tokenId) external view returns (uint48);
/// @notice A record of states for signing / validating signatures
function nonces(address account) external view returns (uint256);
/// @inheritdoc IVotes
function delegates(uint256 delegator) external view returns (uint256);
/// @notice A record of delegated token checkpoints for each account, by index
/// @param tokenId .
/// @param index .
/// @return Checkpoint
function checkpoints(uint256 tokenId, uint48 index) external view returns (Checkpoint memory);
/// @inheritdoc IVotes
function getPastVotes(address account, uint256 tokenId, uint256 timestamp) external view returns (uint256);
/// @inheritdoc IVotes
function getPastTotalSupply(uint256 timestamp) external view returns (uint256);
/*///////////////////////////////////////////////////////////////
DAO VOTING LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IVotes
function delegate(uint256 delegator, uint256 delegatee) external;
/// @inheritdoc IVotes
function delegateBySig(
uint256 delegator,
uint256 delegatee,
uint256 nonce,
uint256 expiry,
uint8 v,
bytes32 r,
bytes32 s
) external;
/*//////////////////////////////////////////////////////////////
ERC6372 LOGIC
//////////////////////////////////////////////////////////////*/
/// @inheritdoc IERC6372
function clock() external view returns (uint48);
/// @inheritdoc IERC6372
function CLOCK_MODE() external view returns (string memory);
}
interface IRewardsDistributor {
event CheckpointToken(uint256 time, uint256 tokens);
event Claimed(uint256 indexed tokenId, uint256 indexed epochStart, uint256 indexed epochEnd, uint256 amount);
error NotMinter();
error NotManagedOrNormalNFT();
error UpdatePeriod();
/// @notice 7 days in seconds
function WEEK() external view returns (uint256);
/// @notice Timestamp of contract creation
function startTime() external view returns (uint256);
/// @notice Timestamp of most recent claim of tokenId
function timeCursorOf(uint256 tokenId) external view returns (uint256);
/// @notice The last timestamp Minter has called checkpointToken()
function lastTokenTime() external view returns (uint256);
/// @notice Interface of VotingEscrow.sol
function ve() external view returns (IVotingEscrow);
/// @notice Address of token used for distributions (HYDRO)
function token() external view returns (address);
/// @notice Address of Minter.sol
/// Authorized caller of checkpointToken()
function minter() external view returns (address);
/// @notice Amount of token in contract when checkpointToken() was last called
function tokenLastBalance() external view returns (uint256);
/// @notice Called by Minter to notify Distributor of rebases
function checkpointToken() external;
/// @notice Returns the amount of rebases claimable for a given token ID
/// @dev Allows claiming of rebases up to 50 epochs old
/// @param tokenId The token ID to check
/// @return The amount of rebases claimable for the given token ID
function claimable(uint256 tokenId) external view returns (uint256);
/// @notice Claims rebases for a given token ID
/// @dev Allows claiming of rebases up to 50 epochs old
/// `Minter.updatePeriod()` must be called before claiming
/// @param tokenId The token ID to claim for
/// @return The amount of rebases claimed
function claim(uint256 tokenId) external returns (uint256);
/// @notice Claims rebases for a list of token IDs
/// @dev `Minter.updatePeriod()` must be called before claiming
/// @param tokenIds The token IDs to claim for
/// @return Whether or not the claim succeeded
function claimMany(uint256[] calldata tokenIds) external returns (bool);
/// @notice Used to set minter once on initialization
/// @dev Callable once by Minter only, Minter is immutable
function setMinter(address _minter) external;
}
interface IMinter {
struct AirdropParams {
// List of addresses to receive Liquid Tokens from the airdrop
address[] liquidWallets;
// List of amounts of Liquid Tokens to be issued
uint256[] liquidAmounts;
// List of addresses to receive Locked NFTs from the airdrop
address[] lockedWallets;
// List of amounts of Locked NFTs to be issued
uint256[] lockedAmounts;
}
error NotTeam();
error RateTooHigh();
error ZeroAddress();
error InvalidParams();
error AlreadyNudged();
error NotPendingTeam();
error NotEpochGovernor();
error AlreadyInitialized();
error TailEmissionsInactive();
event Mint(address indexed _sender, uint256 _weekly, uint256 _circulating_supply, bool indexed _tail);
event DistributeLocked(address indexed _destination, uint256 _amount, uint256 _tokenId);
event Nudge(uint256 indexed _period, uint256 _oldRate, uint256 _newRate);
event DistributeLiquid(address indexed _destination, uint256 _amount);
event AcceptTeam(address indexed _newTeam);
/// @notice Interface of Hydro.sol
function hydro() external view returns (IHydro);
/// @notice Interface of Voter.sol
function voter() external view returns (IVoter);
/// @notice Interface of IVotingEscrow.sol
function ve() external view returns (IVotingEscrow);
/// @notice Interface of RewardsDistributor.sol
function rewardsDistributor() external view returns (IRewardsDistributor);
/// @notice Duration of epoch in seconds
function WEEK() external view returns (uint256);
/// @notice Decay rate of emissions as percentage of `MAX_BPS`
function WEEKLY_DECAY() external view returns (uint256);
/// @notice Growth rate of emissions as percentage of `MAX_BPS` in first 14 weeks
function WEEKLY_GROWTH() external view returns (uint256);
/// @notice Maximum tail emission rate in basis points.
function MAXIMUM_TAIL_RATE() external view returns (uint256);
/// @notice Minimum tail emission rate in basis points.
function MINIMUM_TAIL_RATE() external view returns (uint256);
/// @notice Denominator for emissions calculations (as basis points)
function MAX_BPS() external view returns (uint256);
/// @notice Rate change per proposal
function NUDGE() external view returns (uint256);
/// @notice When emissions fall below this amount, begin tail emissions
function TAIL_START() external view returns (uint256);
/// @notice Maximum team percentage in basis points
function MAXIMUM_TEAM_RATE() external view returns (uint256);
/// @notice Current team percentage in basis points
function teamRate() external view returns (uint256);
/// @notice Tail emissions rate in basis points
function tailEmissionRate() external view returns (uint256);
/// @notice Starting weekly emission of 10M HYDRO (HYDRO has 18 decimals)
function weekly() external view returns (uint256);
/// @notice Timestamp of start of epoch that updatePeriod was last called in
function activePeriod() external view returns (uint256);
/// @notice Number of epochs in which updatePeriod was called
function epochCount() external view returns (uint256);
/// @notice Boolean used to verify if contract has been initialized
function initialized() external returns (bool);
/// @dev activePeriod => proposal existing, used to enforce one proposal per epoch
/// @param _activePeriod Timestamp of start of epoch
/// @return True if proposal has been executed, else false
function proposals(uint256 _activePeriod) external view returns (bool);
/// @notice Current team address in charge of emissions
function team() external view returns (address);
/// @notice Possible team address pending approval of current team
function pendingTeam() external view returns (address);
/// @notice Mints liquid tokens and permanently locked NFTs to the provided accounts
/// @param params Struct that stores the wallets and amounts for the Airdrops
function initialize(AirdropParams memory params) external;
/// @notice Creates a request to change the current team's address
/// @param _team Address of the new team to be chosen
function setTeam(address _team) external;
/// @notice Accepts the request to replace the current team's address
/// with the requested one, present on variable pendingTeam
function acceptTeam() external;
/// @notice Creates a request to change the current team's percentage
/// @param _rate New team rate to be set in basis points
function setTeamRate(uint256 _rate) external;
/// @notice Allows epoch governor to modify the tail emission rate by at most 1 basis point
/// per epoch to a maximum of 100 basis points or to a minimum of 1 basis point.
/// Note: the very first nudge proposal must take place the week prior
/// to the tail emission schedule starting.
/// @dev Throws if not epoch governor.
/// Throws if not currently in tail emission schedule.
/// Throws if already nudged this epoch.
/// Throws if nudging above maximum rate.
/// Throws if nudging below minimum rate.
/// This contract is coupled to EpochGovernor as it requires three option simple majority voting.
function nudge() external;
/// @notice Calculates rebases according to the formula
/// weekly * ((hydro.totalsupply - ve.totalSupply) / hydro.totalsupply) ^ 2 / 2
/// Note that ve.totalSupply is the locked ve supply
/// hydro.totalSupply is the total ve supply minted
/// @param _minted Amount of HYDRO minted this epoch
/// @return _growth Rebases
function calculateGrowth(uint256 _minted) external view returns (uint256 _growth);
/// @notice Processes emissions and rebases. Callable once per epoch (1 week).
/// @return _period Start of current epoch.
function updatePeriod() external returns (uint256 _period);
}
interface IEpochGovernor {
enum ProposalState {
Pending,
Active,
Canceled,
Defeated,
Succeeded,
Queued,
Expired,
Executed
}
/// @dev Stores most recent voting result. Will be either Defeated, Succeeded or Expired.
/// Any contracts that wish to use this governor must read from this to determine results.
function result() external returns (ProposalState);
}
// OpenZeppelin Contracts (last updated v4.8.0) (token/ERC20/utils/SafeERC20.sol)
// OpenZeppelin Contracts v4.4.1 (token/ERC20/extensions/IERC20Permit.sol)
/**
* @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.
*/
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].
*/
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);
}
// OpenZeppelin Contracts (last updated v4.8.0) (utils/Address.sol)
/**
* @dev Collection of functions related to the address type
*/
library Address {
/**
* @dev Returns true if `account` is a contract.
*
* [IMPORTANT]
* ====
* It is unsafe to assume that an address for which this function returns
* false is an externally-owned account (EOA) and not a contract.
*
* Among others, `isContract` will return false for the following
* types of addresses:
*
* - an externally-owned account
* - a contract in construction
* - an address where a contract will be created
* - an address where a contract lived, but was destroyed
*
* Furthermore, `isContract` will also return true if the target contract within
* the same transaction is already scheduled for destruction by `SELFDESTRUCT`,
* which only has an effect at the end of a transaction.
* ====
*
* [IMPORTANT]
* ====
* You shouldn't rely on `isContract` to protect against flash loan attacks!
*
* Preventing calls from contracts is highly discouraged. It breaks composability, breaks support for smart wallets
* like Gnosis Safe, and does not provide security since it can be circumvented by calling from a contract
* constructor.
* ====
*/
function isContract(address account) internal view returns (bool) {
// This method relies on extcodesize/address.code.length, which returns 0
// for contracts in construction, since the code is only stored at the end
// of the constructor execution.
return account.code.length > 0;
}
/**
* @dev Replacement for Solidity's `transfer`: sends `amount` wei to
* `recipient`, forwarding all available gas and reverting on errors.
*
* https://eips.ethereum.org/EIPS/eip-1884[EIP1884] increases the gas cost
* of certain opcodes, possibly making contracts go over the 2300 gas limit
* imposed by `transfer`, making them unable to receive funds via
* `transfer`. {sendValue} removes this limitation.
*
* https://consensys.net/diligence/blog/2019/09/stop-using-soliditys-transfer-now/[Learn more].
*
* IMPORTANT: because control is transferred to `recipient`, care must be
* taken to not create reentrancy vulnerabilities. Consider using
* {ReentrancyGuard} or the
* https://solidity.readthedocs.io/en/v0.5.11/security-considerations.html#use-the-checks-effects-interactions-pattern[checks-effects-interactions pattern].
*/
function sendValue(address payable recipient, uint256 amount) internal {
require(address(this).balance >= amount, "Address: insufficient balance");
(bool success, ) = recipient.call{value: amount}("");
require(success, "Address: unable to send value, recipient may have reverted");
}
/**
* @dev Performs a Solidity function call using a low level `call`. A
* plain `call` is an unsafe replacement for a function call: use this
* function instead.
*
* If `target` reverts with a revert reason, it is bubbled up by this
* function (like regular Solidity function calls).
*
* Returns the raw returned data. To convert to the expected return value,
* use https://solidity.readthedocs.io/en/latest/units-and-global-variables.html?highlight=abi.decode#abi-encoding-and-decoding-functions[`abi.decode`].
*
* Requirements:
*
* - `target` must be a contract.
* - calling `target` with `data` must not revert.
*
* _Available since v3.1._
*/
function functionCall(address target, bytes memory data) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, "Address: low-level call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`], but with
* `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
return functionCallWithValue(target, data, 0, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but also transferring `value` wei to `target`.
*
* Requirements:
*
* - the calling contract must have an ETH balance of at least `value`.
* - the called Solidity function must be `payable`.
*
* _Available since v3.1._
*/
function functionCallWithValue(address target, bytes memory data, uint256 value) internal returns (bytes memory) {
return functionCallWithValue(target, data, value, "Address: low-level call with value failed");
}
/**
* @dev Same as {xref-Address-functionCallWithValue-address-bytes-uint256-}[`functionCallWithValue`], but
* with `errorMessage` as a fallback revert reason when `target` reverts.
*
* _Available since v3.1._
*/
function functionCallWithValue(
address target,
bytes memory data,
uint256 value,
string memory errorMessage
) internal returns (bytes memory) {
require(address(this).balance >= value, "Address: insufficient balance for call");
(bool success, bytes memory returndata) = target.call{value: value}(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(address target, bytes memory data) internal view returns (bytes memory) {
return functionStaticCall(target, data, "Address: low-level static call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a static call.
*
* _Available since v3.3._
*/
function functionStaticCall(
address target,
bytes memory data,
string memory errorMessage
) internal view returns (bytes memory) {
(bool success, bytes memory returndata) = target.staticcall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(address target, bytes memory data) internal returns (bytes memory) {
return functionDelegateCall(target, data, "Address: low-level delegate call failed");
}
/**
* @dev Same as {xref-Address-functionCall-address-bytes-string-}[`functionCall`],
* but performing a delegate call.
*
* _Available since v3.4._
*/
function functionDelegateCall(
address target,
bytes memory data,
string memory errorMessage
) internal returns (bytes memory) {
(bool success, bytes memory returndata) = target.delegatecall(data);
return verifyCallResultFromTarget(target, success, returndata, errorMessage);
}
/**
* @dev Tool to verify that a low level call to smart-contract was successful, and revert (either by bubbling
* the revert reason or using the provided one) in case of unsuccessful call or if target was not a contract.
*
* _Available since v4.8._
*/
function verifyCallResultFromTarget(
address target,
bool success,
bytes memory returndata,
string memory errorMessage
) internal view returns (bytes memory) {
if (success) {
if (returndata.length == 0) {
// only check isContract if the call was successful and the return data is empty
// otherwise we already know that it was a contract
require(isContract(target), "Address: call to non-contract");
}
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
/**
* @dev Tool to verify that a low level call was successful, and revert if it wasn't, either by bubbling the
* revert reason or using the provided one.
*
* _Available since v4.3._
*/
function verifyCallResult(
bool success,
bytes memory returndata,
string memory errorMessage
) internal pure returns (bytes memory) {
if (success) {
return returndata;
} else {
_revert(returndata, errorMessage);
}
}
function _revert(bytes memory returndata, string memory errorMessage) private pure {
// Look for revert reason and bubble it up if present
if (returndata.length > 0) {
// The easiest way to bubble the revert reason is using memory via assembly
/// @solidity memory-safe-assembly
assembly {
let returndata_size := mload(returndata)
revert(add(32, returndata), returndata_size)
}
} else {
revert(errorMessage);
}
}
}
/**
* @title SafeERC20
* @dev Wrappers around ERC20 operations that throw on failure (when the token
* contract returns false). Tokens that return no value (and instead revert or
* throw on failure) are also supported, non-reverting calls are assumed to be
* successful.
* To use this library you can add a `using SafeERC20 for IERC20;` statement to your contract,
* which allows you to call the safe operations as `token.safeTransfer(...)`, etc.
*/
library SafeERC20 {
using Address for address;
function safeTransfer(IERC20 token, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint256 value) internal {
_callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
/**
* @dev Deprecated. This function has issues similar to the ones found in
* {IERC20-approve}, and its usage is discouraged.
*
* Whenever possible, use {safeIncreaseAllowance} and
* {safeDecreaseAllowance} instead.
*/
function safeApprove(IERC20 token, address spender, uint256 value) internal {
// safeApprove should only be called when setting an initial allowance,
// or when resetting it to zero. To increase and decrease it, use
// 'safeIncreaseAllowance' and 'safeDecreaseAllowance'
require(
(value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function safeIncreaseAllowance(IERC20 token, address spender, uint256 value) internal {
uint256 newAllowance = token.allowance(address(this), spender) + value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
function safeDecreaseAllowance(IERC20 token, address spender, uint256 value) internal {
unchecked {
uint256 oldAllowance = token.allowance(address(this), spender);
require(oldAllowance >= value, "SafeERC20: decreased allowance below zero");
uint256 newAllowance = oldAllowance - value;
_callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, newAllowance));
}
}
function safePermit(
IERC20Permit token,
address owner,
address spender,
uint256 value,
uint256 deadline,
uint8 v,
bytes32 r,
bytes32 s
) internal {
uint256 nonceBefore = token.nonces(owner);
token.permit(owner, spender, value, deadline, v, r, s);
uint256 nonceAfter = token.nonces(owner);
require(nonceAfter == nonceBefore + 1, "SafeERC20: permit did not succeed");
}
/**
* @dev Imitates a Solidity high-level call (i.e. a regular function call to a contract), relaxing the requirement
* on the return value: the return value is optional (but if data is returned, it must not be false).
* @param token The token targeted by the call.
* @param data The call data (encoded using abi.encode or one of its variants).
*/
function _callOptionalReturn(IERC20 token, bytes memory data) private {
// We need to perform a low level call here, to bypass Solidity's return data size checking mechanism, since
// we're implementing it ourselves. We use {Address-functionCall} to perform this call, which verifies that
// the target address contains contract code and also asserts for success in the low-level call.
bytes memory returndata = address(token).functionCall(data, "SafeERC20: low-level call failed");
if (returndata.length > 0) {
// Return data is optional
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}
/// @title Minter
/// @author velodrome.finance, @figs999, @pegahcarter
/// @notice Controls minting of emissions and rebases for the Protocol
contract Minter is IMinter {
using SafeERC20 for IHydro;
/// @inheritdoc IMinter
IHydro public immutable hydro;
/// @inheritdoc IMinter
IVoter public immutable voter;
/// @inheritdoc IMinter
IVotingEscrow public immutable ve;
/// @inheritdoc IMinter
IRewardsDistributor public immutable rewardsDistributor;
/// @inheritdoc IMinter
uint256 public constant WEEK = 1 weeks;
/// @inheritdoc IMinter
uint256 public constant WEEKLY_DECAY = 9_900;
/// @inheritdoc IMinter
uint256 public constant WEEKLY_GROWTH = 10_300;
/// @inheritdoc IMinter
uint256 public constant MAXIMUM_TAIL_RATE = 100;
/// @inheritdoc IMinter
uint256 public constant MINIMUM_TAIL_RATE = 1;
/// @inheritdoc IMinter
uint256 public constant MAX_BPS = 10_000;
/// @inheritdoc IMinter
uint256 public constant NUDGE = 1;
/// @inheritdoc IMinter
uint256 public constant TAIL_START = 8_969_150 * 1e18;
/// @inheritdoc IMinter
uint256 public tailEmissionRate = 67;
/// @inheritdoc IMinter
uint256 public constant MAXIMUM_TEAM_RATE = 500;
/// @inheritdoc IMinter
uint256 public teamRate = 500; // team emissions start at 5%
/// @inheritdoc IMinter
uint256 public weekly = 10_000_000 * 1e18;
/// @inheritdoc IMinter
uint256 public activePeriod;
/// @inheritdoc IMinter
uint256 public epochCount;
/// @inheritdoc IMinter
mapping(uint256 => bool) public proposals;
/// @inheritdoc IMinter
address public team;
/// @inheritdoc IMinter
address public pendingTeam;
/// @inheritdoc IMinter
bool public initialized;
constructor(
address _voter, // the voting & distribution system
address _ve, // the ve(3,3) system that will be locked into
address _rewardsDistributor // the distribution system that ensures users aren't diluted
) {
hydro = IHydro(IVotingEscrow(_ve).token());
voter = IVoter(_voter);
ve = IVotingEscrow(_ve);
team = msg.sender;
rewardsDistributor = IRewardsDistributor(_rewardsDistributor);
activePeriod = ((block.timestamp) / WEEK) * WEEK; // allow emissions this coming epoch
}
/// @inheritdoc IMinter
function initialize(AirdropParams memory params) external {
if (initialized) revert AlreadyInitialized();
if (msg.sender != team) revert NotTeam();
if (
(params.liquidWallets.length != params.liquidAmounts.length) ||
(params.lockedWallets.length != params.lockedAmounts.length)
) revert InvalidParams();
initialized = true;
// Liquid Token Mint
uint256 _len = params.liquidWallets.length;
for (uint256 i = 0; i < _len; i++) {
hydro.mint(params.liquidWallets[i], params.liquidAmounts[i]);
emit DistributeLiquid(params.liquidWallets[i], params.liquidAmounts[i]);
}
// Locked NFT mint
_len = params.lockedWallets.length;
uint256 _sum;
for (uint256 i = 0; i < _len; i++) {
_sum += params.lockedAmounts[i];
}
uint256 _tokenId;
hydro.mint(address(this), _sum);
hydro.safeApprove(address(ve), _sum);
for (uint256 i = 0; i < _len; i++) {
_tokenId = ve.createLock(params.lockedAmounts[i], WEEK);
ve.lockPermanent(_tokenId);
ve.safeTransferFrom(address(this), params.lockedWallets[i], _tokenId);
emit DistributeLocked(params.lockedWallets[i], params.lockedAmounts[i], _tokenId);
}
hydro.safeApprove(address(ve), 0);
}
/// @inheritdoc IMinter
function setTeam(address _team) external {
if (msg.sender != team) revert NotTeam();
if (_team == address(0)) revert ZeroAddress();
pendingTeam = _team;
}
/// @inheritdoc IMinter
function acceptTeam() external {
if (msg.sender != pendingTeam) revert NotPendingTeam();
team = pendingTeam;
delete pendingTeam;
emit AcceptTeam(team);
}
/// @inheritdoc IMinter
function setTeamRate(uint256 _rate) external {
if (msg.sender != team) revert NotTeam();
if (_rate > MAXIMUM_TEAM_RATE) revert RateTooHigh();
teamRate = _rate;
}
/// @inheritdoc IMinter
function calculateGrowth(uint256 _minted) public view returns (uint256 _growth) {
uint256 _veTotal = ve.totalSupplyAt(activePeriod - 1);
uint256 _hydroTotal = hydro.totalSupply();
return (((_minted * (_hydroTotal - _veTotal)) / _hydroTotal) * (_hydroTotal - _veTotal)) / _hydroTotal / 2;
}
/// @inheritdoc IMinter
function nudge() external {
address _epochGovernor = voter.epochGovernor();
if (msg.sender != _epochGovernor) revert NotEpochGovernor();
IEpochGovernor.ProposalState _state = IEpochGovernor(_epochGovernor).result();
if (weekly >= TAIL_START) revert TailEmissionsInactive();
uint256 _period = activePeriod;
if (proposals[_period]) revert AlreadyNudged();
uint256 _newRate = tailEmissionRate;
uint256 _oldRate = _newRate;
if (_state != IEpochGovernor.ProposalState.Expired) {
if (_state == IEpochGovernor.ProposalState.Succeeded) {
_newRate = _oldRate + NUDGE > MAXIMUM_TAIL_RATE ? MAXIMUM_TAIL_RATE : _oldRate + NUDGE;
} else {
_newRate = _oldRate - NUDGE < MINIMUM_TAIL_RATE ? MINIMUM_TAIL_RATE : _oldRate - NUDGE;
}
tailEmissionRate = _newRate;
}
proposals[_period] = true;
emit Nudge(_period, _oldRate, _newRate);
}
/// @inheritdoc IMinter
function updatePeriod() external returns (uint256 _period) {
_period = activePeriod;
if (block.timestamp >= _period + WEEK) {
epochCount++;
_period = (block.timestamp / WEEK) * WEEK;
activePeriod = _period;
uint256 _weekly = weekly;
uint256 _emission;
uint256 _totalSupply = hydro.totalSupply();
bool _tail = _weekly < TAIL_START;
if (_tail) {
_emission = (_totalSupply * tailEmissionRate) / MAX_BPS;
} else {
_emission = _weekly;
if (epochCount < 15) {
_weekly = (_weekly * WEEKLY_GROWTH) / MAX_BPS;
} else {
_weekly = (_weekly * WEEKLY_DECAY) / MAX_BPS;
}
weekly = _weekly;
}
uint256 _growth = calculateGrowth(_emission);
uint256 _rate = teamRate;
uint256 _teamEmissions = (_rate * (_growth + _weekly)) / (MAX_BPS - _rate);
uint256 _required = _growth + _emission + _teamEmissions;
uint256 _balanceOf = hydro.balanceOf(address(this));
if (_balanceOf < _required) {
hydro.mint(address(this), _required - _balanceOf);
}
hydro.safeTransfer(address(team), _teamEmissions);
hydro.safeTransfer(address(rewardsDistributor), _growth);
rewardsDistributor.checkpointToken(); // checkpoint token balance that was just minted in rewards distributor
hydro.safeApprove(address(voter), _emission);
voter.notifyRewardAmount(_emission);
emit Mint(msg.sender, _emission, hydro.totalSupply(), _tail);
}
}
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Contract ABI
API[{"inputs":[{"internalType":"address","name":"_voter","type":"address"},{"internalType":"address","name":"_ve","type":"address"},{"internalType":"address","name":"_rewardsDistributor","type":"address"}],"stateMutability":"nonpayable","type":"constructor"},{"inputs":[],"name":"AlreadyInitialized","type":"error"},{"inputs":[],"name":"AlreadyNudged","type":"error"},{"inputs":[],"name":"InvalidParams","type":"error"},{"inputs":[],"name":"NotEpochGovernor","type":"error"},{"inputs":[],"name":"NotPendingTeam","type":"error"},{"inputs":[],"name":"NotTeam","type":"error"},{"inputs":[],"name":"RateTooHigh","type":"error"},{"inputs":[],"name":"TailEmissionsInactive","type":"error"},{"inputs":[],"name":"ZeroAddress","type":"error"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_newTeam","type":"address"}],"name":"AcceptTeam","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_destination","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"}],"name":"DistributeLiquid","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_destination","type":"address"},{"indexed":false,"internalType":"uint256","name":"_amount","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_tokenId","type":"uint256"}],"name":"DistributeLocked","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"_sender","type":"address"},{"indexed":false,"internalType":"uint256","name":"_weekly","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_circulating_supply","type":"uint256"},{"indexed":true,"internalType":"bool","name":"_tail","type":"bool"}],"name":"Mint","type":"event"},{"anonymous":false,"inputs":[{"indexed":true,"internalType":"uint256","name":"_period","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_oldRate","type":"uint256"},{"indexed":false,"internalType":"uint256","name":"_newRate","type":"uint256"}],"name":"Nudge","type":"event"},{"inputs":[],"name":"MAXIMUM_TAIL_RATE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAXIMUM_TEAM_RATE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MAX_BPS","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"MINIMUM_TAIL_RATE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"NUDGE","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"TAIL_START","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WEEK","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WEEKLY_DECAY","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"WEEKLY_GROWTH","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"acceptTeam","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"activePeriod","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"_minted","type":"uint256"}],"name":"calculateGrowth","outputs":[{"internalType":"uint256","name":"_growth","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"epochCount","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"hydro","outputs":[{"internalType":"contract IHydro","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"components":[{"internalType":"address[]","name":"liquidWallets","type":"address[]"},{"internalType":"uint256[]","name":"liquidAmounts","type":"uint256[]"},{"internalType":"address[]","name":"lockedWallets","type":"address[]"},{"internalType":"uint256[]","name":"lockedAmounts","type":"uint256[]"}],"internalType":"struct IMinter.AirdropParams","name":"params","type":"tuple"}],"name":"initialize","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"initialized","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"nudge","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"pendingTeam","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"uint256","name":"","type":"uint256"}],"name":"proposals","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"rewardsDistributor","outputs":[{"internalType":"contract IRewardsDistributor","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"_team","type":"address"}],"name":"setTeam","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"uint256","name":"_rate","type":"uint256"}],"name":"setTeamRate","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"tailEmissionRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"team","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"teamRate","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"updatePeriod","outputs":[{"internalType":"uint256","name":"_period","type":"uint256"}],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"ve","outputs":[{"internalType":"contract IVotingEscrow","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"voter","outputs":[{"internalType":"contract IVoter","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"weekly","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"}]Contract Creation Code
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Constructor Arguments (ABI-Encoded and is the last bytes of the Contract Creation Code above)
00000000000000000000000050a459fc0069843750091d6382afc960d0b22b6d000000000000000000000000e0d35cf2ab00f3c11f10535db27807f3de139f11000000000000000000000000233d9d30a07fef1dc84f137410613cd21cbba464
-----Decoded View---------------
Arg [0] : _voter (address): 0x50a459FC0069843750091D6382aFC960d0b22b6d
Arg [1] : _ve (address): 0xe0d35cf2ab00f3C11F10535DB27807F3DE139F11
Arg [2] : _rewardsDistributor (address): 0x233d9D30A07FeF1dC84f137410613CD21Cbba464
-----Encoded View---------------
3 Constructor Arguments found :
Arg [0] : 00000000000000000000000050a459fc0069843750091d6382afc960d0b22b6d
Arg [1] : 000000000000000000000000e0d35cf2ab00f3c11f10535db27807f3de139f11
Arg [2] : 000000000000000000000000233d9d30a07fef1dc84f137410613cd21cbba464
Deployed Bytecode Sourcemap
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Swarm Source
ipfs://8618bb4aa27703361745a9acaa0973cb2671f65e6c79b91e237c5e66ccd9694f
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Multichain Portfolio | 31 Chains
| Chain | Token | Portfolio % | Price | Amount | Value |
|---|
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.