Solidity-IERC20-Example

A simple ERC20 token smart contract implementation in Solidity, tested with TypeScript using Viem and Hardhat.

Features

• ERC20 standard functions implemented: totalSupply, balanceOf, transfer, approve, allowance, transferFrom
• Fully tested with TypeScript + Viem
• Demonstrates deploying contracts, interacting with functions, and testing ERC20 behavior
• Includes examples for approve and transferFrom patterns

Tech Stack

• Solidity ^0.8.0
• TypeScript
• Hardhat (local Ethereum test network)
• Viem (contract interaction library)
• Node.js & npm

Installation

npm install && npx hardhat test

✔ IERC20 should be able to verify all variants values
✔ deployer should hava total supply balance
✔ transfer should work correctly
✔ approve and allowacne should work
✔ transferFrom should work correctly