builDsa.js

require('dotenv').config()
const Tx = require('ethereumjs-tx').Transaction;
const Web3 = require('web3');
const web3 = new Web3(new Web3.providers.HttpProvider(process.env.INFURA_ETH_NODE_URL))

const WALLET_PRIVATE_KEY = Buffer.from(process.env.WALLET_PRIVATE_KEY, 'hex');
const WALLET_ADDRESS = process.env.WALLET_ADDRESS
var BUILD_ADDRESS = "0x2971AdFa57b20E5a416aE5a708A8655A9c74f723";
var BUILD_ABI = [{"inputs":[{"internalType":"address","name":"_owner","type":"address"},{"internalType":"uint256","name":"accountVersion","type":"uint256"},{"internalType":"address","name":"_origin","type":"address"}],"name":"build","outputs":[{"internalType":"address","name":"_account","type":"address"}],"stateMutability":"nonpayable","type":"function"}];

// build DSA
async function buildSmartAccount(authority, version, origin) {

    // checks the tx count and increments by 1
    const txCount = await web3.eth.getTransactionCount(authority);
    console.log(`Tx count: ${txCount}`);

    // build contract
    const contract = new web3.eth.Contract(BUILD_ABI, BUILD_ADDRESS);

    // transaction data
    const txData = contract.methods.build(authority, version, origin).encodeABI();

    // transaction to be sent
    const rawTx = new Tx({
        from: authority,
        to: BUILD_ADDRESS,
        data: txData,
        gasLimit: web3.utils.toHex(700000),
        gasPrice: web3.utils.toHex(web3.utils.toWei('11', 'gwei')),
        nonce: txCount
    });

    // sign private key
    rawTx.sign(WALLET_PRIVATE_KEY);

    // serialize tx
    const serializedTx = await rawTx.serialize();
    const txHash = await web3.utils.sha3(serializedTx)
    console.log(`https://etherscan.io/tx/${txHash}`)

    var txReceipt = await web3.eth.sendSignedTransaction('0x' + serializedTx.toString('hex')).catch(error => console.log(error));
    console.log(txReceipt);

}

buildSmartAccount(WALLET_ADDRESS, 1, "0x0000000000000000000000000000000000000000");