We’ll be working with a ShardeumAPI class that encapsulates all our interactions with the Shardeum network. This class demonstrates two primary ways to interact with Shardeum’s JSON-RPC:
  1. Using ethers.js BrowserProvider and Signer: For wallet interactions (connecting, sending transactions).
  2. Direct fetch calls: For simple read-only queries (e.g., getting balance or gas price).

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Full Class Code

import { ethers } from 'ethers';

class ShardeumAPI {
  constructor() {
    this.rpcUrl = 'https://api-testnet.shardeum.org';
    this.provider = null;
    this.signer = null;
    this.txHistory = {};
  }
  // ... (rest of the class as in the guide)
}

export default new ShardeumAPI();