Learn ETHERSJS with Real Code Examples

Query account balances

Send Ether from one wallet to another

Interact with ERC-20 token contracts

Listen for Transfer events from a contract

Deploy and interact with custom smart contracts

Check provider URL and network connectivity

Ensure wallet has sufficient balance

Verify contract ABI matches deployed bytecode

Check nonce and gas limit for transactions

Handle asynchronous calls with proper awaits

Unit-test smart contract calls

Test wallet transactions on testnet

Simulate events and responses

Check gas limits and transaction failures

Validate ABI encoding/decoding

Local Ethereum node

Testnets (Goerli, Sepolia)

Mainnet deployment

Dockerized backend services

CI/CD pipelines for automated contract interactions

Ethers.js core library

Infura/Alchemy providers

Hardhat for local testing and deployment

TypeScript type definitions

Ethers.js utilities (BigNumber, utils, constants)

Ethereum mainnet and testnets (Goerli, Sepolia, etc.)

DeFi protocols (Uniswap, Aave)

NFT marketplaces

Wallets (MetaMask, Ledger, Trezor)

Frontend frameworks (React, Vue, Angular)

Use async/await to simplify code

Leverage TypeScript types for safety

Cache provider queries when possible

Reuse contract instances

Test extensively on testnets

Understanding Ethereum gas and fees

Handling asynchronous calls

Managing private keys securely

Complex event-driven contract interactions

Integrating with multiple testnets/mainnet