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Replace revert strings with custom errors (#4261)

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Co-authored-by: Hadrien Croubois <hadrien.croubois@gmail.com>
Co-authored-by: Francisco <fg@frang.io>
This commit is contained in:
Ernesto García
2023-06-12 17:41:52 -06:00
committed by GitHub
parent 08fd777f6d
commit b425a72240
138 changed files with 3220 additions and 1287 deletions
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18
contracts/token/ERC20/extensions/ERC20Permit.sol
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@ -24,6 +24,16 @@ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712, Nonces {
bytes32 private constant _PERMIT_TYPEHASH =
keccak256("Permit(address owner,address spender,uint256 value,uint256 nonce,uint256 deadline)");
/**
* @dev Permit deadline has expired.
*/
error ERC2612ExpiredSignature(uint256 deadline);
/**
* @dev Mismatched signature.
*/
error ERC2612InvalidSigner(address signer, address owner);
/**
* @dev Initializes the {EIP712} domain separator using the `name` parameter, and setting `version` to `"1"`.
*
@ -43,14 +53,18 @@ abstract contract ERC20Permit is ERC20, IERC20Permit, EIP712, Nonces {
bytes32 r,
bytes32 s
) public virtual {
require(block.timestamp <= deadline, "ERC20Permit: expired deadline");
if (block.timestamp > deadline) {
revert ERC2612ExpiredSignature(deadline);
}
bytes32 structHash = keccak256(abi.encode(_PERMIT_TYPEHASH, owner, spender, value, _useNonce(owner), deadline));
bytes32 hash = _hashTypedDataV4(structHash);
address signer = ECDSA.recover(hash, v, r, s);
require(signer == owner, "ERC20Permit: invalid signature");
if (signer != owner) {
revert ERC2612InvalidSigner(signer, owner);
}
_approve(owner, spender, value);
}