GEO NFT

NFT Marketplace on Harmony ONE blockchain testnet. NFT is an SVG generated on-chain based on the location name and latitude/longitude.

The moving gradient is uniquely generated based on the latitude and longitude.

NFT samples

Features

• On-chain NFT generated via SVG, inspired by Uniswap LP NFT.
• Only owner (Ownable contract) can mint NFT at localhost:3000/location/add
• Owner can mint any places using Google Places autocomplete.
• User can buy NFT and see their own NFT and where the NFT is located in the map.

Roadmap

• Making the on-chain NFT looks more exclusive and premium.
• Use pooling to mimic real-time.
• Enable no refresh after user changing address.
• Native integration with Harmony wallet.
• User can buy through auction.

Known issue

• User can't list back their item in the marketplace due to unable to execute IERC721.transferFrom function because the signer address(checksummed) and the msg.sender(not checksummed) but there are the same address.

Development

Installing dependencies by yarn install and it will generate types based on the contracts.

Deploying contracts to testnet by yarn testnet:deploy

Run NFT marketplace test by yarn test:token or yarn test:svg to test only the on-chain NFT SVG library. NFT will be generated inside the image folder.

Rename .env.example to .env.local to add the Mapbox API token, Firebase API key for the search location API, Marketplace and NFT addresses on testnet.

You will get both addresses after runned the yarn testnet:deploy in the command prompt.

Build with

• React
• Next.js
• Typescript
• Mapbox
• Hardhat