This project demonstrates the power of ERC998 composable NFTs through a car assembly example. Cars are composable NFTs that can own and be composed of various car parts (also NFTs), showcasing the "NFT of NFTs" concept.

ERC998 is a standard for composable NFTs that allows an NFT to own other NFTs and ERC20 tokens. This creates hierarchical ownership structures where a parent NFT can contain child tokens, enabling complex digital asset compositions.

Find more information about ERC998 here.

This demo project includes:

• Car Contract: ERC998 composable NFT representing cars that can own car parts
• Part Contracts: ERC721/ERC998 NFTs representing individual car parts (Engine, Wheel, FuelTank)
• Fuel Contract: ERC20 token representing fuel that can be owned by fuel tanks
• Interactive Demo Script: Comprehensive demonstration of car assembly and disassembly

• Node.js (v18 or higher)

Run the interactive demo script that demonstrates all ERC998 functionality:

1. Clone the repository:

git clone https://github.com/maxnorm/erc998-demo-car.git

2. Install dependencies:

npm install

3. Run the development network (In another terminal):

npx hardhat node

4. Run the demo script & monitor the logs to see the demo:

npx hardhat run scripts/demo.ts --network localhost

This script will:

1. Deploy Car, Engine, Wheel, FuelTank, and Fuel contracts
2. Mint various car parts (engine, 4 wheels, fuel tank) and fuel
3. Assemble parts into a complete car using different ERC998 methods
4. Demonstrate part transfers and disassembly
5. Show car sales with all nested ownership intact
6. Verify ownership hierarchies throughout the process