pragma solidity ^0.4.24; import "../cryptography/ECDSA.sol"; contract ECDSAMock { using ECDSA for bytes32; function recover(bytes32 hash, bytes signature) public pure returns (address) { return hash.recover(signature); } function toEthSignedMessageHash(bytes32 hash) public pure returns (bytes32) { return hash.toEthSignedMessageHash(); } }