pragma solidity ^0.5.0; import "../cryptography/ECDSA.sol"; contract ECDSAMock { using ECDSA for bytes32; function recover(bytes32 hash, bytes memory signature) public pure returns (address) { return hash.recover(signature); } function toEthSignedMessageHash(bytes32 hash) public pure returns (bytes32) { return hash.toEthSignedMessageHash(); } }