Blockchain Development Programming Tutorials, Guides & Best Practices

• 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.

To follow along with this tutorial, you’ll need:

• Node.js installed on your machine.
• A basic understanding of JavaScript.
• An Etherscan API key (explained below).
• Familiarity with Ethers.js for blockchain interaction.

npm install ethers

Let’s start by sending Ether from one account to another using Ethers.js and Infura.

Wallet Address: 0xYourEthereumAddress
Wallet Balance: 2.345 ETH

• Ethers.js: We are using Ethers.js to interact with the Ethereum blockchain. Ethers.js simplifies the process of querying the blockchain and formatting the data for developers.
• Provider: Whether you use Infura or a public node, the provider allows us to connect to the Ethereum network. Infura is commonly used because of its reliability and scalability, but public nodes can work as well if you're looking for a simple alternative.
• getBalance(): This function queries the Ethereum network for the balance of the wallet in wei (the smallest unit of ETH). We then use ethers.utils.formatEther() to convert the balance from wei to Ether.

  <dependency>
    <groupId>org.web3j</groupId>
    <artifactId>core</artifactId>
    <version>4.8.7</version>
  </dependency>

• Website: web3j