Before we dive into the code, ensure you have the following installed:
  • Node.js: A JavaScript runtime environment. Download here. We recommend an LTS (Long Term Support) version.
  • npm (Node Package Manager): Comes bundled with Node.js.
  • MetaMask (or similar browser wallet): Our example code is designed for a browser environment where a wallet like MetaMask injects window.ethereum. This is essential for user authentication and transaction signing.
  • Basic JavaScript knowledge: Familiarity with async/await, classes, and ES6 modules will be helpful.

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Installing Dependencies

Our tutorial will primarily use the ethers.js library, which simplifies interacting with Ethereum-compatible blockchains. 
mkdir shardeum-rpc-tutorial
cd shardeum-rpc-tutorial
npm init -y
npm install ethers