Smart Contract Interaction Example

Usage

1. Install Node.js and npm.
2. Install dependencies using the following command:

npm install web3

3. Set rpcUrl to the RPC URL of your Ethereum node.
4. Set contractAddress to your smart contract address.
5. Set contractABI to your smart contract ABI.

Code Example

// Import web3 library
const Web3 = require('web3');

// Set the RPC URL of the Ethereum node
const rpcUrl = 'http://localhost:8545'; // Replace with your Ethereum node's RPC URL

// Create a web3 instance
const web3 = new Web3(rpcUrl);

// Smart contract address
const contractAddress = '0x1234567890123456789012345678901234567890'; // Replace with your smart contract address

// Smart contract ABI (JSON format)
const contractABI = [
// Smart contract ABI definition here
]; // Replace with your smart contract ABI

// Create a smart contract instance
const contract = new web3.eth.Contract(contractABI, contractAddress);

// Interaction with the smart contract here

Notes
Make sure to handle error cases appropriately in real applications and implement error handling and logic control as needed.