Cryptocurrency Development Tutorials, Guides & Insights

In this tutorial, you learned how to use Ethers.js to query ERC-20 token balances and how to leverage the Etherscan API to retrieve token transaction histories. These are essential techniques for building decentralized applications, wallets, or blockchain explorers that interact with ERC-20 tokens on the Ethereum network.

You now have the tools to query token balances and transaction histories programmatically, enabling you to create powerful blockchain-based applications.

If everything is set up correctly, you’ll see an output like this:

Wallet Address: 0xYourEthereumAddress
Wallet Balance: 1.234 ETH

If you plan to use Infura as your Ethereum provider, follow these steps:

Now, let's create a script to query the balance of an Ethereum wallet. This script will work with both Infura and public nodes.

Token burns serve several key purposes in the cryptocurrency world:

The "0x000000000000000000000000000000000000dead" address is used as a burn address because it is widely recognized as a destination for token destruction. Since tokens sent to this address are permanently locked and cannot be retrieved, it’s an ideal address for conducting token burns. It is a well-established convention across many blockchain projects.

This function retrieves and prints the available balance in your BTC wallet.

Monitoring open positions is essential for active traders to manage their portfolio and respond to market changes.