EVM Verification Contract V0

Stork provides a stateless signature verification contract for EVM-compatible chains that can be used to verify if a provided signature was signed by the relevant, permitted publisher.

This contract is deployed at the following addresses:

Testnet

  • ETH Goerli Testnet: 0x73d7E67F39a4f0831292e90aBA925d70E3432b28

  • Arbitrum Goerli Testnet: 0x1e2922DcFc7922576Cc6DD68AD80CF345eaF15Ad

  • Avalanche Fuji Testnet: 0x2eDF1CfD907faA5c2B68F76C3dcBB92278a5C366

  • X Layer Testnet: 0xF89CEf90CF229c564596cf105D19bc92e17b98C4

Mainnet

  • Avalanche: 0x1e2922DcFc7922576Cc6DD68AD80CF345eaF15Ad

  • Arbitrum: 0x1e2922DcFc7922576Cc6DD68AD80CF345eaF15Ad

  • X Layer: 0xF89CEf90CF229c564596cf105D19bc92e17b98C4

For additional chains, please email info@stork.network

// SPDX-License-Identifier: UNLICENSED

pragma solidity >=0.5.0 <0.9.0;

contract Verify {
    function getEthSignedMessageHash32(bytes32 message) private pure returns (bytes32) {
        return keccak256(abi.encodePacked("\x19Ethereum Signed Message:\n32", message));
    }

    function getMessageHash(
        address oracle_name,
        string memory asset_pair_id,
        uint256 timestamp,
        uint256 price
    ) private pure returns (bytes32) {
        return keccak256(abi.encodePacked(oracle_name, asset_pair_id, timestamp, price));
    }

    function getSigner(
        bytes32 signed_message_hash,
        bytes32 r,
        bytes32 s,
        uint8 v
    ) private pure returns (address) {
        return ecrecover(signed_message_hash, v, r, s);
    }

    function verifySignature(
        address oracle_pubkey,
        string memory asset_pair_id,
        uint256 timestamp,
        uint256 price,
        bytes32 r,
        bytes32 s,
        uint8 v
    ) public pure returns (bool) {
        bytes32 msg_hash = getMessageHash(oracle_pubkey, asset_pair_id, timestamp, price);
        bytes32 signed_message_hash = getEthSignedMessageHash32(msg_hash);

        // Verify hash was generated by the actual user
        address signer = getSigner(signed_message_hash, r, s, v);
        return (signer == oracle_pubkey) ? true : false;
    }
}

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