Ethereum Development Tutorials, Guides & Insights

Both crypto.randomBytes and ethers.randomBytes generate cryptographically secure random bytes, meaning the bytes are suitable for use in cryptographic applications such as key generation, encryption, and other security-sensitive operations.

• Use crypto.randomBytes when:
• You are building Node.js applications without blockchain-specific functionality.
• You want to avoid adding external dependencies.
• Use ethers.randomBytes when:
• You are developing Ethereum-related applications and already have ethers.js in your project.
• You want the flexibility of generating random bytes with minimal configuration, defaulting to 32 bytes for Ethereum addresses or private keys.

You should see a list of token transactions for the specified address, with details including the sender, recipient, value transferred, and transaction hash.

You can customize the Etherscan API request to suit your needs. Here are a few options:

In some cases, you might want to use both Etherscan and Infura. For example, you might use Etherscan to query transaction histories or token transfers, and Infura to send transactions or deploy contracts.

• Etherscan: Use to fetch transaction history and display it in your dApp.
• Infura: Use to allow users to send transactions or interact with smart contracts.

Transaction sent: 0xTransactionHash
Transaction confirmed: { transaction details }

Next, let’s interact with a smart contract using Ethers.js and Infura. For this example, we will call a read-only function from an ERC-20 token contract (like querying the balance of a wallet).

We will use Axios to make HTTP requests to the Etherscan API. To install Axios, run the following command in your project folder:

npm install axios