63 lines
2.3 KiB
Solidity
63 lines
2.3 KiB
Solidity
// SPDX-License-Identifier: MIT
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// OpenZeppelin Contracts v4.4.1 (governance/extensions/GovernorVotesQuorumFraction.sol)
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pragma solidity ^0.8.0;
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import "./GovernorVotesUpgradeable.sol";
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import "../../proxy/utils/Initializable.sol";
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/**
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* @dev Extension of {Governor} for voting weight extraction from an {ERC20Votes} token and a quorum expressed as a
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* fraction of the total supply.
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*
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* _Available since v4.3._
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*/
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abstract contract GovernorVotesQuorumFractionUpgradeable is Initializable, GovernorVotesUpgradeable {
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uint256 private _quorumNumerator;
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event QuorumNumeratorUpdated(uint256 oldQuorumNumerator, uint256 newQuorumNumerator);
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function __GovernorVotesQuorumFraction_init(uint256 quorumNumeratorValue) internal onlyInitializing {
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__GovernorVotesQuorumFraction_init_unchained(quorumNumeratorValue);
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}
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function __GovernorVotesQuorumFraction_init_unchained(uint256 quorumNumeratorValue) internal onlyInitializing {
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_updateQuorumNumerator(quorumNumeratorValue);
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}
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function quorumNumerator() public view virtual returns (uint256) {
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return _quorumNumerator;
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}
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function quorumDenominator() public view virtual returns (uint256) {
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return 100;
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}
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function quorum(uint256 blockNumber) public view virtual override returns (uint256) {
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return (token.getPastTotalSupply(blockNumber) * quorumNumerator()) / quorumDenominator();
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}
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function updateQuorumNumerator(uint256 newQuorumNumerator) external virtual onlyGovernance {
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_updateQuorumNumerator(newQuorumNumerator);
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}
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function _updateQuorumNumerator(uint256 newQuorumNumerator) internal virtual {
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require(
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newQuorumNumerator <= quorumDenominator(),
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"GovernorVotesQuorumFraction: quorumNumerator over quorumDenominator"
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);
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uint256 oldQuorumNumerator = _quorumNumerator;
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_quorumNumerator = newQuorumNumerator;
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emit QuorumNumeratorUpdated(oldQuorumNumerator, newQuorumNumerator);
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}
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/**
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* This empty reserved space is put in place to allow future versions to add new
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* variables without shifting down storage in the inheritance chain.
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* See https://docs.openzeppelin.com/contracts/4.x/upgradeable#storage_gaps
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*/
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uint256[49] private __gap;
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}
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