This article shows how to thoroughly test the DeFi Central ERC20 token presale smart contract using Hardhat and Chai on the Ethereum Sepolia testnet. We’ll cover testing all key functionalities, including token purchases with multiple currencies, claiming, refunds, and withdraw functions. Testing smart contracts on a testnet before mainnet deployment is crucial for ensuring functionality … Continue reading [Tutorial 2/4] Thorough Testing for ERC20 Token Presale Smart Contract (DeFi Central)