# multi-wallet-sig

> multisig for Ethereum using detached signatures

Latest version **1.0.4** (published 2018-10-15) · ISC license · 0 weekly downloads

## Install

```sh
npm install multi-wallet-sig
pnpm add multi-wallet-sig
yarn add multi-wallet-sig
bun add multi-wallet-sig
```

## Health

**Score 5/100 (F)** — status: abandoned.

Positive: no vulnerabilities.

Warnings: low downloads; no types; no esm support.

Negative: insecure dependencies; abandoned; low maintenance score.

## Facts

| | |
|---|---|
| Version | 1.0.4 |
| Published | 2018-10-15 |
| First published | 2018-10-10 |
| Weekly downloads | 0 |
| License | ISC |
| TypeScript types | none |
| Module format | CommonJS |
| Dependencies | 5 |
| Unpacked size | 7 KB |
| Known vulnerabilities | 0 |
| Install scripts | no |
| Author | drunken |
| Maintainers | drunken |
| Keywords | Ethereum, Wallet, Multisig |

## Links

- npm: https://www.npmjs.com/package/multi-wallet-sig
- Repository: https://github.com/drunken005/multi-wallet-sig
- Homepage: https://github.com/drunken005/multi-wallet-sig#readme
- Issues: https://github.com/drunken005/multi-wallet-sig/issues
- npm.io page: https://npm.io/package/multi-wallet-sig

## Dependencies (5)

- [lodash](https://npm.io/package/lodash.md) ^4.17.11
- [left-pad](https://npm.io/package/left-pad.md) ^1.3.0
- [bignumber.js](https://npm.io/package/bignumber.js.md) git+https://github.com/frozeman/bignumber.js-nolookahead.git
- [solidity-sha3](https://npm.io/package/solidity-sha3.md) ^0.4.1
- [ethereumjs-util](https://npm.io/package/ethereumjs-util.md) ^5.2.0

## Recent versions

- 1.0.4 (latest) — 2018-10-15
- 1.0.3 — 2018-10-12
- 1.0.2 — 2018-10-12
- 1.0.1 — 2018-10-10
- 1.0.0 — 2018-10-10

## README

# 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](https://github.com/drunken005/offline-multiSigWallet-demo)

### Example
```bash
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](https://github.com/Arachnid/EIPs/commit/8f8b68d37a4c9e1207d1f3f8b987d62270824ce0)


## Get Started
```bash
npm install multi-wallet-sig --save
```
## Test
```bash
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
```bash
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'
    ]
}
```

---
_Source: https://npm.io/package/multi-wallet-sig · Machine-readable twin of the npm.io package page. Health data is recomputed on every publish._