Multichain Tools

A TypeScript library for handling multi-chain transactions and signatures using MPC (Multi-Party Computation).

Overview

This library provides a unified interface for interacting with different blockchain networks through a common set of methods. It uses MPC for secure key management and transaction signing.

Features

• Multi-Chain Support: Built-in support for EVM chains, Bitcoin, and Cosmos networks
• Unified Interface: Common API across all supported chains
• MPC Integration: Secure key management and transaction signing
• Type Safety: Full TypeScript support with comprehensive type definitions
• Modular Design: Easy to extend with new chain implementations
• Secure: No private keys stored or transmitted

Installation

npm install multichain-tools
# or
yarn add multichain-tools
# or
pnpm add multichain-tools

Quick Example

import { EVM } from '@multichain-tools/chains/EVM'
import { ChainSignaturesContract } from '@multichain-tools/utils/near/contract'

// Initialize MPC contract
const contract = new ChainSignaturesContract({
  networkId: 'testnet',
  contractId: 'mpc.testnet',
})

// Initialize chain
const chain = new EVM({
  rpcUrl: 'https://mainnet.infura.io/v3/YOUR-PROJECT-ID',
  contract,
})

// Create and sign transaction
const { transaction, mpcPayloads } = await chain.getMPCPayloadAndTransaction({
  to: '0x1234...',
  value: '1000000000000000000', // 1 ETH
})

const signature = await contract.sign({
  payload: mpcPayloads[0].payload,
  path: 'any_string',
  key_version: 0,
})

const signedTx = chain.addSignature({
  transaction,
  mpcSignatures: [signature],
})

const txHash = await chain.broadcastTx(signedTx)

Documentation

For detailed documentation, including:

• Getting started guide
• Chain-specific implementations
• MPC system overview
• Implementation guides
• API reference

Visit our documentation site.