ERC-721 Guided Implementation Lab — Forge College

Ready to translate your ERC-721 design into modular, compile-ready contracts that support royalties and dynamic metadata? This guided lab walks you through implementing the core pieces so your architecture becomes working Solidity code.

What you'll learn
In this hands-on lesson you'll implement three cooperating Solidity modules: a core ERC-721 base with mint and transfer plumbing, a royalty module that follows an EIP-2981-style per-token royalty response, and a metadata module exposing controlled update hooks. You'll set up a local Hardhat environment, create CoreERC721.sol, RoyaltyModule.sol, and MetadataHooks.sol to match your module map, wire interfaces and inheritance so modules interact without tight coupling, and add minimal access control so only intended controllers can update metadata or royalty settings. The lab also shows how to scaffold basic unit test stubs that verify compilation, royalty return values, and metadata persistence so you can validate behavior in the next lesson.

Who this is for
Advanced Solidity developers who already understand ERC-721 fundamentals, interfaces, and basic upgradeability/access-control patterns. Prior experience with Hardhat and contract design artifacts (interface sketches, module maps) is recommended.

Key topics covered
- Implement core ERC-721 behaviors: minting, transfers, and interface declarations
- Build an EIP-2981-style royalty module that returns per-token receiver and amount
- Expose controlled metadata hooks with enforced access control boundaries
- Wire modules via interfaces and inheritance to keep implementations decoupled
- Set up Hardhat compile/deploy and scaffold unit test stubs for verification
- Apply smart-wallet and privileged-operation patterns where appropriate

Start building now and convert your architecture artifacts into working contracts. Learn more and access additional resources at: https://www.forge.college/

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