@tgrospic/rnode-http-js/dist-module/eth/eth-sign.js

HTTP client support for RNode

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import { ec } from 'elliptic';
import * as ethUtil from 'ethereumjs-util';
import { decodeAscii } from '../codecs';
import { deployDataProtobufSerialize } from '../rnode-sign';
/**
 * Recover public key from Ethereum signed data and signature.
 *
 * @param data - Signed message bytes
 * @param sigHex - Signature base 16
 * @returns Public key base 16
 */
export var recoverPublicKeyEth = function (data, sigHex) {
    // Ethereum lib to recover public key from massage and signature
    var hashed = ethUtil.hashPersonalMessage(ethUtil.toBuffer(__spread(data)));
    var _a = ethUtil.fromRpcSig(sigHex), v = _a.v, r = _a.r, s = _a.s;
    // Public key without prefix
    var pubkeyRecover = ethUtil.ecrecover(hashed, v, r, s);
    return ethUtil.bufferToHex(Buffer.from(__spread([4], pubkeyRecover)));
};
/**
 * Verify deploy signed with Ethereum compatible signature.
 */
export var verifyDeployEth = function (deploySigned) {
    var term = deploySigned.term, timestamp = deploySigned.timestamp, phloPrice = deploySigned.phloPrice, phloLimit = deploySigned.phloLimit, validAfterBlockNumber = deploySigned.validAfterBlockNumber, deployer = deploySigned.deployer, sig = deploySigned.sig;
    // Serialize deploy data for signing
    var deploySerialized = deployDataProtobufSerialize({
        term: term, timestamp: timestamp, phloPrice: phloPrice, phloLimit: phloLimit, validAfterBlockNumber: validAfterBlockNumber,
    });
    // Create a hash of message with prefix
    // https://github.com/ethereumjs/ethereumjs-util/blob/4a8001c/src/signature.ts#L136
    var deployLen = deploySerialized.length;
    var msgPrefix = "\u0019Ethereum Signed Message:\n" + deployLen;
    var prefixBin = decodeAscii(msgPrefix);
    var msg = __spread(prefixBin, deploySerialized);
    var hashed = ethUtil.keccak256(Buffer.from(msg));
    // Check deployer's signature
    var crypt = new ec('secp256k1');
    var key = crypt.keyFromPublic(deployer);
    var sigRS = { r: sig.slice(0, 32), s: sig.slice(32, 64) };
    var isValid = key.verify(hashed, sigRS);
    return isValid;
};
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