An EVM package for verifying signed messages on ethereum
Contract can be used as an EVM package, or inherited as part of another contract.
validateSignature(bytes32 _message, bytes memory _sig, address _address)
Given three arguments, the hash of a message (_message), the signed version of that message (_sig) and an address (address) it will return true if the given address has signed the message, false if not and revert if there is an error.
recoverSigner(bytes32 _message, bytes memory _sig)
Given two arguments, the hash of a message (_message) and the signed version of that message (_sig) it will return the public address corresponding to the private key with which the message (_message) was signed.
To run tests type:
truffle test
Based on https://github.com/OpenZeppelin/openzeppelin-solidity/blob/master/contracts/cryptography/ECDSA.sol
Based on https://github.com/pubkey/eth-crypto
Adapted by: Dennison Bertram, dennison@dennisonbertram.com, dennison@zeppelin.solutions