Instadapp/dsa-periphery-contract
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chg: getDigest method !review

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sanchaymittal 2023-05-04 16:01:41 +09:00
parent 3a3a1246c6
commit a735c5535c
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1 changed files with 32 additions and 27 deletions
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59
contracts/InstadappAdapter.sol
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@ -50,33 +50,6 @@ contract InstadappAdapter is EIP712 {
/// Constructor /// Constructor
constructor() EIP712("InstaTargetAuth", "1") {} constructor() EIP712("InstaTargetAuth", "1") {}
/// Public functions
/// @dev This function is used to verify the signature.
/// @param auth The address of the auth.
/// @param signature The signature of the auth.
/// @param castData The data that will be sent to the targets.
/// @param salt The salt that will be used to prevent replay attacks.
/// @param deadline The deadline that will be used to prevent replay attacks.
/// @return boolean that indicates if the signature is valid.
function verify(
address auth,
bytes memory signature,
CastData memory castData,
bytes32 salt,
uint256 deadline
) public view returns (bool) {
bytes32 digest = _hashTypedDataV4(keccak256(abi.encode(SIG_TYPEHASH, hash(castData), salt, deadline)));
address signer = ECDSA.recover(digest, signature);
return signer == auth;
}
/// @dev This function is used to hash the CastData struct.
/// @param castData The data that will be sent to the targets.
/// @return bytes32 that is the hash of the CastData struct.
function hash(CastData memory castData) public pure returns (bytes32) {
return keccak256(abi.encode(CASTDATA_TYPEHASH, castData._targetNames, castData._datas, castData._origin));
}
/// Internal functions /// Internal functions
/// @dev This function is used to forward the call to dsa.cast function. /// @dev This function is used to forward the call to dsa.cast function.
/// Cast the call is forwarded, the signature is verified and the salt is stored in the sigReplayProtection mapping. /// Cast the call is forwarded, the signature is verified and the salt is stored in the sigReplayProtection mapping.
@ -113,4 +86,36 @@ contract InstadappAdapter is EIP712 {
// Cast the call // Cast the call
dsa.cast(castData._targetNames, castData._datas, castData._origin); dsa.cast(castData._targetNames, castData._datas, castData._origin);
} }
/// @dev This function is used to verify the signature.
/// @param auth The address of the auth.
/// @param signature The signature of the auth.
/// @param castData The data that will be sent to the targets.
/// @param salt The salt that will be used to prevent replay attacks.
/// @param deadline The deadline that will be used to prevent replay attacks.
/// @return boolean that indicates if the signature is valid.
function verify(
address auth,
bytes memory signature,
CastData memory castData,
bytes32 salt,
uint256 deadline
) internal view returns (bool) {
bytes32 digest = getDigest(castData, salt, deadline);
address signer = ECDSA.recover(digest, signature);
return signer == auth;
}
function getDigest(CastData memory castData, bytes32 salt, uint256 deadline) internal view returns (bytes32) {
return _hashTypedDataV4(keccak256(abi.encode(SIG_TYPEHASH, getHash(castData), salt, deadline)));
}
/// @dev This function is used to hash the CastData struct.
/// @param castData The data that will be sent to the targets.
/// @return bytes32 that is the hash of the CastData struct.
function getHash(CastData memory castData) internal pure returns (bytes32) {
return keccak256(abi.encode(CASTDATA_TYPEHASH, castData._targetNames, castData._datas, castData._origin));
}
} }