multi-wallet-sig

multisig for Ethereum using detached signatures

About

Ethereum multisig contract Using 0x19 thus makes it possible to extend the scheme by defining a version 0x45 (E) to handle these kinds of signatures. This package provides a pre-signed transaction message for the contract function

Demo code

Example

function submitTransactionPreSigned(address destination, uint value, bytes data, uint nonce, uint8 v, bytes32 r, bytes32 s)
    public
    returns (bytes32 transactionHash)
{
   // Arguments when calculating hash to validate
    // 1: byte(0x19) - the initial 0x19 byte
    // 2: byte(0) - the version byte
    // 4: this - the validator address
    // 4-7 : Application specific data
    transactionHash = keccak256(byte(0x19),byte(0),this,destination, value, data, nonce);
    sender = ecrecover(transactionHash, v, r, s);
    // ...
}

From EIP 191

Get Started

npm install multi-wallet-sig --save

Test

npm test

Functions

createSig(s)(privateKey, ...args)

Signs a sha3 message hash with the private key

Inputs

• privateKey(s)： The ETH private key(s) to sign
• args： Contract method arguments

Return value

Signed hash as signature object with v, r and s values.

Usage

const multiWalletSig = require('multi-wallet-sig');

const privateKeys = [
    'B4D3CD82B474F9F050C1EC91606086FB8A4B41E82CC3D34566523A290FB653CE',
    'D3DE84FF6B6C020D0CF43251298FD40F54A2E4D6C043C8B3FF02AB1FF7F99B37'
];
const multi = '0x51b929f4cf7c7c95bffd3f9a1b0f8a512bf40c98';
const nonce = 0;
const destination = '0x5d6b33755202d5f3fda82dabb826fbc596a45cd9';
const value = 1000000000000000000;
const data = '0x';

//A single private key signature
multiWalletSig.createSig(privateKeys[0], multi, nonce, destination, value, data);
return:
{
    sigV: 27,
    sigR: '0xb0dfd906caa8f840148c83c3140085c77f7d60dc4740dd98270f6c12c43a7f6e',
    sigS: '0x4a5029dc9dbaf2fcc36b87e6705b3a31053bd5a0a067d8855d26324a82b97d60'
}

//Multiple private key signatures
multiWalletSig.createSigs(privateKeys, multi, nonce, destination, value, data);
return:
{
    sigV: [28, 27],
    sigR: [
        '0xf8529a11b5b817edfeb3e8bee6600d36873134f9b5a2f72561cf308578f2e004',
        '0x5bf1249e00bfe7d0e14b6b1003dca26ea31e6db73c2f6c189b2ba2e6411c06bd'
    ],
    sigS: [
        '0x4e1fb1d0641ccff474fdd461f5e871e42f5f245b0b4c5a203a43da794e1a7fb3',
        '0x5de1b2ba42e16b98b5f01d13fef0faf3443c4409e37889b3b0df98c5c6fbd7f6'
    ]
}