Ethereum: How to query blockchain.info?

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Blockchain.info Query: Step-by-step guide

Blockchain.info is a popular online platform that provides access to various blockchain data, including Ethereum. In this article, we will show you how to query the blockchain.info API for an address and determine your current balance, ignoring transactions without sufficient confirmations.

Prerequisites

Before you start, make sure you have:

• An Ethereum wallet (e.g. MetaMask, MyEtherWallet)

• The Ethereum blockchain info API URL:

First, create awalletobject in JavaScript that represents your Ethereum wallet. You can use a library like Web3.js or ethers.js to interact with the Ethereum blockchain.

const web3 = require('web3');
const Wallet = window.web3.eth.account.Wallet;
const account = Wallet.fromPrivateKey(Buffer.from('your-wallet-private-key'));

Set the api-endpointproperty of your wallet object to the blockchain.info API URL:

const wallet = new Wallet();
wallet.apiEndpoint = '

Add an optional parameter address, which specifies the Ethereum address you want to query.

const address = '0xYourAddress';
wallet.address = address;

fetch(wallet.apiEndpoint +address=${address}&type=balance&confirmations=3, {
method: 'GET',
headers: { Accept: 'application/json' },
})
.then((response) => response.json())
.then((data) => console.log(data))
.catch((error) => console.error(error));

const web3 = require('web3');
const Wallet = window.web3.eth.account.Wallet;
const address = '0xYourAddress';
const web3Instance = new web3.providers.HttpProvider('
const wallet = new Wallet();
wallet.apiEndpoint =
fetch(wallet.apiEndpoint + address=${address}&type=balance&confirmations=3, {
method: 'GET',
headers: { Accept: 'application/json' },
})
.then((response) => response.json())
.then((data) => console.log(data))
.catch((error) => console.error(error));

This code will search the blockchain.info API with your Ethereum address and ignore transactions without enough confirmations (3 confirmations).

Conclusion

In this article, we have shown how to search the blockchain.info API with an Ethereum address and determine the current balance, ignoring transactions without enough confirmations. By following these steps and using the wallet object in JavaScript, you can easily access blockchain data and perform complex queries.

Be sure to replace YOUR-Wallet-Private-Key with your actual Ethereum private key when creating the wallet object. Also make sure you have the necessary dependencies installed (web3 or ethers.js) before running this code.

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