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Split ERC20Votes and ERC20VotesComp (#2706)
Co-authored-by: Francisco Giordano <[email protected]>
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| @@ -0,0 +1,25 @@ | ||
| // SPDX-License-Identifier: MIT | ||
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| pragma solidity ^0.8.0; | ||
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| import "../token/ERC20/extensions/ERC20VotesComp.sol"; | ||
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| contract ERC20VotesCompMock is ERC20VotesComp { | ||
| constructor (string memory name, string memory symbol) | ||
| ERC20(name, symbol) | ||
| ERC20Permit(name) | ||
| {} | ||
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| function mint(address account, uint256 amount) public { | ||
| _mint(account, amount); | ||
| } | ||
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| function burn(address account, uint256 amount) public { | ||
| _burn(account, amount); | ||
| } | ||
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| function getChainId() external view returns (uint256) { | ||
| return block.chainid; | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,46 @@ | ||
| // SPDX-License-Identifier: MIT | ||
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| pragma solidity ^0.8.0; | ||
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| import "./ERC20Votes.sol"; | ||
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| /** | ||
| * @dev Extension of ERC20 to support Compound's voting and delegation. This version exactly matches Compound's | ||
| * interface, with the drawback of only supporting supply up to (2^96^ - 1). | ||
| * | ||
| * NOTE: You should use this contract if you need exact compatibility with COMP (for example in order to use your token | ||
| * with Governor Alpha or Bravo) and if you are sure the supply cap of 2^96^ is enough for you. Otherwise, use the | ||
| * {ERC20Votes} variant of this module. | ||
| * | ||
| * This extensions keeps a history (checkpoints) of each account's vote power. Vote power can be delegated either | ||
| * by calling the {delegate} function directly, or by providing a signature to be used with {delegateBySig}. Voting | ||
| * power can be queried through the public accessors {getCurrentVotes} and {getPriorVotes}. | ||
| * | ||
| * By default, token balance does not account for voting power. This makes transfers cheaper. The downside is that it | ||
| * requires users to delegate to themselves in order to activate checkpoints and have their voting power tracked. | ||
| * Enabling self-delegation can easily be done by overriding the {delegates} function. Keep in mind however that this | ||
| * will significantly increase the base gas cost of transfers. | ||
| * | ||
| * _Available since v4.2._ | ||
| */ | ||
| abstract contract ERC20VotesComp is ERC20Votes { | ||
| /** | ||
| * @dev Comp version of the {getVotes} accessor, with `uint96` return type. | ||
| */ | ||
| function getCurrentVotes(address account) external view returns (uint96) { | ||
| return SafeCast.toUint96(getVotes(account)); | ||
| } | ||
| /** | ||
| * @dev Comp version of the {getPastVotes} accessor, with `uint96` return type. | ||
| */ | ||
| function getPriorVotes(address account, uint256 blockNumber) external view returns (uint96) { | ||
| return SafeCast.toUint96(getPastVotes(account, blockNumber)); | ||
| } | ||
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| /** | ||
| * @dev Maximum token supply. Reduced to `type(uint96).max` (2^96^ - 1) to fit COMP interface. | ||
| */ | ||
| function _maxSupply() internal view virtual override returns (uint224) { | ||
| return type(uint96).max; | ||
| } | ||
| } |
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