How to Generate Raw Transaction

Phalcon Block supports various automated blocking methods, allowing users to submit signed raw transactions to the system.

When the Phalcon Block system meets the triggering conditions, it automatically sends the signed raw transaction to perform further actions, e.g., pausing the protocol or other activities.

This document shows how to generate a signed raw transation.

JavaScript

Install the Web3 library

npm install web3

Execute the script

The following is a sample script to show how to get a raw transaction using the Web3 JavasScript library.

Note that this script is for demo purposes. Some variables, e.g., endpoint URL, gasPrice, and number of generated raw transactions, must be changed accordingly.

const { Web3 } = require('web3');

async function signPauseTransaction(gasLimit,gasPrice,i) {
  let contractInstance = new web3Instance.eth.Contract(abi, contractAddr);
  let txCount = await web3Instance.eth.getTransactionCount(senderAddr);
  const txObj = {
      gasLimit: Web3.utils.toHex(gasLimit),
      gasPrice: Web3.utils.toHex(gasPrice),
      to: contractAddr,
      nonce:  txCount + i,
      data: contractInstance.methods.pause().encodeABI()
  }
  let tx = await web3Instance.eth.accounts.signTransaction(txObj, privateKey);
  console.log(txObj.nonce,":",tx.rawTransaction);
}


const privateKey = ""; //Private key of sender address
const senderAddr = ""; //Sender address
const contractAddr = ""; //Contract address
const gasLimit = 100000; //gasLimit
//change the gasPrice if needed
const gasPrice = 51 * 1e9; //gasPrice
//change the URL
const web3Instance = new Web3("https://binance.llamarpc.com");
//change to the ABI of your contract
const abi = [{"anonymous":false,"inputs":[{"indexed":true,"internalType":"address","name":"previousOwner","type":"address"},{"indexed":true,"internalType":"address","name":"newOwner","type":"address"}],"name":"OwnershipTransferred","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Paused","type":"event"},{"anonymous":false,"inputs":[{"indexed":false,"internalType":"address","name":"account","type":"address"}],"name":"Unpaused","type":"event"},{"inputs":[{"internalType":"address","name":"","type":"address"},{"internalType":"address","name":"","type":"address"}],"name":"balances","outputs":[{"internalType":"uint256","name":"","type":"uint256"}],"stateMutability":"view","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"deposit","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"owner","outputs":[{"internalType":"address","name":"","type":"address"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"pause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"paused","outputs":[{"internalType":"bool","name":"","type":"bool"}],"stateMutability":"view","type":"function"},{"inputs":[],"name":"renounceOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"newOwner","type":"address"}],"name":"transferOwnership","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[],"name":"unpause","outputs":[],"stateMutability":"nonpayable","type":"function"},{"inputs":[{"internalType":"address","name":"tokenAddress","type":"address"},{"internalType":"uint256","name":"amount","type":"uint256"}],"name":"withdraw","outputs":[],"stateMutability":"nonpayable","type":"function"}];

//Print transactions with consecutive Nonce values.
for (var i = 0; i < 5; i++) { 
    signPauseTransaction(gasLimit, gasPrice, i);
}

Python

To add.