quicknode-core-workflow-a

# QuickNode Core Workflow A ## Overview Build EVM transaction workflows: send ETH, interact with contracts, listen for events, and handle gas estimation. ## Prerequisites - Completed `quicknode-hello-world` - A funded wallet (use testnet for development) ## Instructions ### Step 1: Send ETH Transaction ```typescript import { ethers } from 'ethers'; const provider = new ethers.JsonRpcProvider(process.env.QUICKNODE_ENDPOINT); const wallet = new ethers.Wallet(process.env.PRIVATE_KEY!, provider); const tx = await wallet.sendTransaction({ to: '0xRecipientAddress', value: ethers.parseEther('0.01'), }); console.log(`TX sent: ${tx.hash}`); const receipt = await tx.wait(); console.log(`Confirmed in block ${receipt!.blockNumber}, gas used: ${receipt!.gasUsed}`); ``` ### Step 2: Call Contract Write Function ```typescript const contractAddress = '0xYourContract'; const abi = ['function transfer(address to, uint256 amount) returns (bool)']; const contract = new ethers.Contract(contractAddress, abi, wallet); const tx = await contract.transfer('0xRecipient', ethers.parseUnits('100', 18)); const receipt = await tx.wait(); console.log(`Transfer confirmed: ${receipt!.hash}`); ``` ### Step 3: Listen for Events (WebSocket) ```typescript const wsProvider = new ethers.WebSocketProvider(process.env.QUICKNODE_WSS); const contract = new ethers.Contract(contractAddress, ['event Transfer(address indexed from, address indexed to, uint256 value)'], wsProvider); contract.on('Transfer', (from...