Quick Start

npm install signet.js
# or
yarn add signet.js
# or
pnpm add signet.js

import { utils, EVM } from 'signet.js'
import { createPublicClient, createWalletClient, http } from 'viem'
import { privateKeyToAccount } from 'viem/accounts'
import { sepolia } from 'viem/chains'
 
const account = privateKeyToAccount(process.env.PRIVATE_KEY as `0x${string}`)
 
const publicClient = createPublicClient({
  chain: sepolia,
  transport: http(),
})
 
const walletClient = createWalletClient({
  account,
  chain: sepolia,
  transport: http(),
})
 
const chainSigContract = new utils.chains.evm.ChainSignatureContract({
  publicClient,
  walletClient,
  contractAddress: utils.constants.CONTRACT_ADDRESSES.ETHEREUM
    .TESTNET_DEV as `0x${string}`,
})
 
const evm = new EVM({
  rpcUrl: 'https://sepolia.infura.io/v3/YOUR-PROJECT-ID',
  contract: chainSigContract,
})
 
const path = 'eth'
const predecessorId = walletClient.account.address
 
const { address: from, publicKey } = await evm.deriveAddressAndPublicKey(
  predecessorId,
  path
)
 
const { balance, decimals } = await evm.getBalance(from)
 
const { transaction, hashesToSign } = await evm.prepareTransactionForSigning({
  from: from as `0x${string}`,
  to: '0x4174678c78fEaFd778c1ff319D5D326701449b25',
  value: 1n, // Amount in wei (1 wei in this example)
})
 
const rsvSignature = await chainSigContract?.sign({
  payload: hashesToSign[0],
  path,
  key_version: 0, // The version of the key to use (usually 0)
})
 
const tx = evm.finalizeTransactionSigning({
  transaction,
  rsvSignatures: [rsvSignature],
})
 
const txHash = await evm.broadcastTx(tx)