how to send address of mathods call of solidaty in node
Certainly! You can use the web3.js library to interact with a Solidity contract in Node.js. Follow these steps to send a method call to a Solidity contract:
- Install web3.js:
npm install web3
- Set up web3 with your Ethereum node provider:
const Web3 = require('web3');
const web3 = new Web3('your_ethereum_node_provider');
- Define the contract ABI (Application Binary Interface) and contract address:
const contractABI = [...]; // Your contract's ABI (generated during compilation)
const contractAddress = '0x123456789...'; // Your contract's address
- Create a contract instance:
const contract = new web3.eth.Contract(contractABI, contractAddress);
- Set up the sender account:
const senderAddress = '0xabcdef123...'; // Your Ethereum account address
const privateKey = '0x0123456789abcdef0123456789abcdef0123456789abcdef0123456789abcdef'; // Your private key
const sender = web3.eth.accounts.privateKeyToAccount(privateKey);
web3.eth.accounts.wallet.add(sender);
web3.eth.defaultAccount = senderAddress;
- Prepare the method call data:
const methodName = 'yourMethod'; // Name of the Solidity method
const methodParams = [param1, param2]; // Parameters for the method
const data = contract.methods[methodName](...methodParams).encodeABI();
- Send the transaction:
const gasPrice = '20000000000'; // Set your gas price
const gasLimit = '300000'; // Set your gas limit
const transactionObject = {
from: senderAddress,
to: contractAddress,
gasPrice,
gas: gasLimit,
data,
};
web3.eth.sendTransaction(transactionObject)
.on('transactionHash', (hash) => {
console.log('Transaction Hash:', hash);
})
.on('confirmation', (confirmationNumber, receipt) => {
console.log('Confirmation Number:', confirmationNumber);
console.log('Receipt:', receipt);
})
.on('error', (error) => {
console.error('Error:', error);
});
Make sure to replace placeholder values with your actual contract ABI, address, sender address, private key, method name, and parameters.