Using NodeInterface

Installation and configuration

First, you need to install the libraries for interacting with EMC chain nodes. For example, you can useweb3.jsLibrary:

npm install web3

Then, configure your project to connect the EMC chain nodes:

const Web3 = require('web3'); const web3 = new Web3('https://rpc.emcchain.io'); // Replace with the RPC URL of the EMC chain

Query node information

The following is a sample code for querying basic information about a node:

async function getNodeInfo() {

const nodeInfo = await web3.eth.getNodeInfo();

console.log('Node Info:', nodeInfo);

}

getNodeInfo();

Query block information

The following is sample code to query specific block information:

async function getBlockInfo(blockNumber) {

const blockInfo = await web3.eth.getBlock(blockNumber);

console.log('Block Info:', blockInfo);

}

getBlockInfo(123456); //Replace with actual block number

Query transaction information

The following is sample code to query specific transaction information:

async function getTransactionInfo(txHash) {

const transactionInfo = await web3.eth.getTransaction(txHash);

console.log('Transaction Info:', transactionInfo);

}

getTransactionInfo('0x123...'); // Replace with actual transaction hash

Query account information

The following is sample code to query the balance of a specific account:

async function getAccountBalance(address) {

const balance = await web3.eth.getBalance(address);

console.log('Account Balance:', web3.utils.fromWei(balance, 'ether'), 'EMC');

}

getAccountBalance('0xabc...'); //Replace with actual account address

Interact with contracts

The following is sample code for calling smart contract methods on the chain:

const contractABI = [ /* Contract ABI */ ]; const contractAddress = '0xdef...'; // Replace with the actual contract address const contract = new web3.eth.Contract(contractABI, contractAddress);

async function callContractMethod() {

const result = await contract.methods.yourMethod().call();

console.log('Contract Method Result:', result);

}

callContractMethod();