56 lines
1.7 KiB
Solidity
56 lines
1.7 KiB
Solidity
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.20;
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import {AbstractSigner} from "./AbstractSigner.sol";
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import {ECDSA} from "../ECDSA.sol";
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/**
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* @dev Implementation of {AbstractSigner} using xref:api:utils/cryptography#ECDSA[ECDSA] signatures.
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*
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* For {Account} usage, a {_setSigner} function is provided to set the {signer} address.
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* Doing so is easier for a factory, who is likely to use initializable clones of this contract.
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*
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* Example of usage:
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*
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* ```solidity
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* contract MyAccountECDSA is Account, SignerECDSA, Initializable {
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* function initialize(address signerAddr) public initializer {
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* _setSigner(signerAddr);
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* }
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* }
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* ```
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*
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* IMPORTANT: Failing to call {_setSigner} either during construction (if used standalone)
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* or during initialization (if used as a clone) may leave the signer either front-runnable or unusable.
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*/
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abstract contract SignerECDSA is AbstractSigner {
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address private _signer;
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constructor(address signerAddr) {
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_setSigner(signerAddr);
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}
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/**
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* @dev Sets the signer with the address of the native signer. This function should be called during construction
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* or through an initializer.
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*/
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function _setSigner(address signerAddr) internal {
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_signer = signerAddr;
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}
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/// @dev Return the signer's address.
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function signer() public view virtual returns (address) {
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return _signer;
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}
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/// @inheritdoc AbstractSigner
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function _rawSignatureValidation(
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bytes32 hash,
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bytes calldata signature
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) internal view virtual override returns (bool) {
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(address recovered, ECDSA.RecoverError err, ) = ECDSA.tryRecover(hash, signature);
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return signer() == recovered && err == ECDSA.RecoverError.NoError;
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}
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}
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