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55 lines
2.0 KiB
Solidity
55 lines
2.0 KiB
Solidity
2 years ago
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// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts (last updated v4.5.0) (governance/utils/IVotes.sol)
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pragma solidity ^0.8.0;
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/**
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* @dev Common interface for {ERC20Votes}, {ERC721Votes}, and other {Votes}-enabled contracts.
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*
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* _Available since v4.5._
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*/
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interface IVotes {
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/**
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* @dev Emitted when an account changes their delegate.
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*/
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event DelegateChanged(address indexed delegator, address indexed fromDelegate, address indexed toDelegate);
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/**
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* @dev Emitted when a token transfer or delegate change results in changes to a delegate's number of votes.
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*/
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event DelegateVotesChanged(address indexed delegate, uint256 previousBalance, uint256 newBalance);
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/**
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* @dev Returns the current amount of votes that `account` has.
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*/
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function getVotes(address account) external view returns (uint256);
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/**
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* @dev Returns the amount of votes that `account` had at the end of a past block (`blockNumber`).
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*/
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function getPastVotes(address account, uint256 blockNumber) external view returns (uint256);
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/**
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* @dev Returns the total supply of votes available at the end of a past block (`blockNumber`).
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*
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* NOTE: This value is the sum of all available votes, which is not necessarily the sum of all delegated votes.
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* Votes that have not been delegated are still part of total supply, even though they would not participate in a
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* vote.
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*/
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function getPastTotalSupply(uint256 blockNumber) external view returns (uint256);
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/**
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* @dev Returns the delegate that `account` has chosen.
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*/
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function delegates(address account) external view returns (address);
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/**
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* @dev Delegates votes from the sender to `delegatee`.
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*/
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function delegate(address delegatee) external;
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/**
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* @dev Delegates votes from signer to `delegatee`.
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*/
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function delegateBySig(address delegatee, uint256 nonce, uint256 expiry, uint8 v, bytes32 r, bytes32 s) external;
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}
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