signature verification in evm(solidity) #253
Description
maybe there are some cases of using signatures from your examples in evm contracts?
what are the verification options? i just know ECDSA.recover(hash, signature)
from @openzeppelin/contracts/utils/cryptography/ECDSA.sol
where there is v value
if (signature.length == 65) {
bytes32 r;
bytes32 s;
uint8 v;
// ecrecover takes the signature parameters, and the only way to get them
// currently is to use assembly.
/// @solidity memory-safe-assembly
assembly {
r := mload(add(signature, 0x20))
s := mload(add(signature, 0x40))
v := byte(0, mload(add(signature, 0x60)))
}
return tryRecover(hash, v, r, s);
} else {
return (address(0), RecoverError.InvalidSignatureLength);
}