Ethereum: How to use the BlockChain API?

February 5, 2025 2:31 am Published by

Using Ethereum’s Blockchain API to Get Your Wallet Balance

Welcome to the world of decentralized finance (DeFi) and blockchain technology! As a complete PHP newbie, you are on the right track by trying to understand how to interact with the Ethereum blockchain API. In this article, we will guide you through the process of using the BlockChain API to get your wallet balance.

Prerequisites

Before we begin, make sure you have the following:

  • A basic understanding of PHP and its ecosystem.
  • A working Ethereum node (e.g. Ethereum Mainnet or Ropsten).
  • The eth-apis library installed via Composer (composer requires ethapi/eth-apis).

Step 1: Set up the API

Create a new PHP file (e.g. get_wallet_balance.php) and install the eth-apis library:

composer create-project ethapi/eth-apis --reuse-of-version=1

Step 2: Start the API

Open your PHP file in a text editor and add the following code to start the API:

require_once __DIR__ . '/vendor/autoload.php';
$api = new EthAPI();

Step 3: Get your wallet balance

Now, let's create a function that returns your wallet balance:

function getWalletBalance() {
$walletAddress = '0x...'; // Replace your Ethereum wallet address with the address
try {
$balance = $api->ethBalance($walletAddress);
echo "Your wallet balance is: " . $balance . "\n";
} catch (exception $e) {
echo "Error getting wallet balance: " . $e->getMessage() . "\n";
}
}

Step 4: Call the function

Finally, whenever you want to get your wallet balance, call your getWalletBalance()function:

getWalletBalance();

Troubleshooting Tips

  • Make sure you have a valid Ethereum wallet address.
  • Make sure the API is connected to your Ethereum node by running api->connect(‘ (replace with your node's IP address).
  • If you encounter errors, check the console output for any error messages.

Example Use Case

Ethereum: How to use BlockChain API?

You can call this function in a script or cron job to get your wallet balance regularly:

while true; do
getWalletBalance;
sleep 1;
done

After following these steps, you should be able to use the Ethereum blockchain API to get your wallet balance. If you encounter any problems or errors, feel free to ask and I’ll be happy to help.

Note: This is just a basic example of how to interact with the Ethereum blockchain API using PHP. For more advanced topics on transactions, smart contracts, and more, please see the official ‘eth-apis’ documentation and other resources on the Ethereum community.

Categorised in:

This post was written by Munna

Comments are closed here.