https://github.com/mehdikhosa50/nft-marketplace-smart-contracts

https://github.com/mehdikhosa50/nft-marketplace-smart-contracts

Last synced: 5 days ago
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• Host: GitHub
• URL: https://github.com/mehdikhosa50/nft-marketplace-smart-contracts
• Owner: MehdiKhosa50
• Created: 2024-12-16T07:03:39.000Z (7 days ago)
• Default Branch: main
• Last Pushed: 2024-12-16T07:09:09.000Z (7 days ago)
• Last Synced: 2024-12-16T08:20:58.883Z (7 days ago)
• Language: Solidity
• Size: 4.88 KB
• Stars: 0
• Watchers: 1
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# NFT Marketplace with Lazy Minting

A decentralized NFT marketplace built on Ethereum that implements lazy minting functionality, allowing creators to mint NFTs without paying upfront gas fees until the first purchase occurs.

## Features

- **Traditional NFT Minting**: Standard ERC721 token minting functionality

- **Lazy Minting**: Gas-less NFT creation using signed vouchers

- **Signature Verification**: EIP-712 compliant signature verification for secure lazy minting

- **Enumerable NFTs**: Keep track of all tokens and their owners

- **Token URI Storage**: Store and retrieve metadata URIs for NFTs

- **Owner Controls**: Special functions restricted to contract owner

## Smart Contracts

The project consists of two main contracts:

1. **PDT_NFT.sol**: A basic NFT contract with signature-based minting

2. **NFTContract.sol**: The main marketplace contract with lazy minting functionality

## Technical Details

### Prerequisites

- Node.js v14+ and npm

- Hardhat or Truffle

- OpenZeppelin Contracts v4.8+

- MetaMask or similar Web3 wallet

### Contract Dependencies

```solidity

@openzeppelin/contracts/token/ERC721/ERC721.sol

@openzeppelin/contracts/token/ERC721/extensions/ERC721Enumerable.sol

@openzeppelin/contracts/token/ERC721/extensions/ERC721URIStorage.sol

@openzeppelin/contracts/utils/cryptography/ECDSA.sol

@openzeppelin/contracts/utils/cryptography/EIP712.sol

How It Works

Creator Flow:

Creator prepares NFT metadata

Creates a signed voucher containing NFT details

Shares the voucher off-chain

Buyer Flow:

Receives the signed voucher

Calls lazyMintNFT with the voucher

Pays the specified price

NFT is minted directly to their address

Verification:

Contract verifies the signature

Checks expiration time

Validates payment amount

Processes the minting and payment

Security Features

Signature verification using EIP-712

Reentrancy protection

Expiration timestamps for vouchers

Owner-only administrative functions

Secure payment handling

Contributing

Contributions are welcome! Please feel free to submit a Pull Request.

License

This project is licensed under the MIT License - see the LICENSE file for details.

Acknowledgments

OpenZeppelin for their secure contract implementations

The Ethereum community for EIP-712 standards

Contact

For questions and support, please open an issue in the repository.

Made with ❤️ for the NFT community