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31 lines
930 B
31 lines
930 B
// SPDX-License-Identifier: MIT
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pragma solidity ^0.8.0;
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import "../utils/cryptography/draft-EIP712.sol";
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import "../utils/cryptography/ECDSA.sol";
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contract EIP712External is EIP712 {
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constructor(string memory name, string memory version) EIP712(name, version) {}
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function domainSeparator() external view returns (bytes32) {
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return _domainSeparatorV4();
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}
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function verify(
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bytes memory signature,
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address signer,
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address mailTo,
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string memory mailContents
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) external view {
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bytes32 digest = _hashTypedDataV4(
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keccak256(abi.encode(keccak256("Mail(address to,string contents)"), mailTo, keccak256(bytes(mailContents))))
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);
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address recoveredSigner = ECDSA.recover(digest, signature);
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require(recoveredSigner == signer);
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}
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function getChainId() external view returns (uint256) {
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return block.chainid;
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}
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}
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