A lot has changed in the Ethereum ecosystem over the last few years. Solidity has matured to 0.8.x, and the developer toolkit has shifted significantly towards Foundry for its sheer speed and Rust-powered reliability.

Today, I’m releasing MIA Mianta (MIA), a modern implementation of a feature-rich ERC20 token designed for the current era of smart contract development.

Why a New ERC20 Implementation?

While there are countless ERC20 templates out there, many are either outdated or too minimal. MIA Mianta combines several essential patterns into a single, cohesive, and battle-tested architecture using OpenZeppelin v5.

Key Features:

• Strict Supply Cap: Implements ERC20Capped to guarantee the 1 Billion (1,000,000,000) maximum supply can never be exceeded.
• Role-Based Access Control: Uses AccessControl for fine-grained permissions (MINTER_ROLE, OPERATOR_ROLE) rather than a simple single-owner bottleneck.
• ERC1363 Support: Implements the transferAndCall and approveAndCall patterns, allowing contracts to react to token movements in a single transaction—no more separate approve then call steps.
• Burnable: Holders can permanently remove tokens from circulation.
• Administrative Safety: Features a finishMinting one-way toggle and the ability to enable/disable transfers during early launch phases.
• Token Recovery: Includes a safeguard to recover any ERC20 tokens accidentally sent to the contract address.

Built with Foundry

Foundry has changed the game for Solidity developers. This project takes full advantage of it:

1. High-Speed Testing: 33 comprehensive unit and fuzz tests that run in milliseconds.
2. Custom Errors: Uses Solidity 0.8+ custom errors (like error MintingFinished()) to save gas on reverts compared to legacy string messages.
3. Advanced Scripts: Includes robust deployment scripts (DeployMIA.s.sol) that handle local Anvil runs and real testnet deployments with automatic Etherscan verification.

The Deployment Workflow

Deploying MIA is simple. If you have Foundry installed:

# Clone and build
git clone https://github.com/phon3/simple-erc20
forge build

# Deploy to local Anvil
forge script script/DeployMIA.s.sol --rpc-url http://127.0.0.1:8545 --broadcast

For professional deployments to Sepolia or Mainnet, the script supports environment-based keys and auto-verification:

forge script script/DeployMIA.s.sol --rpc-url $RPC_URL --broadcast --verify

Check it Out

The code is fully open-source and available on GitHub. Whether you’re looking for a base for your next project or want to see how to implement ERC1363 in a modern stack, MIA Mianta is a great place to start.

🔗 GitHub Repository: phon3/simple-erc20

Happy coding!