Link: Become Human

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  Hero

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  UI

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  OpenSea

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  Dynamic NFT

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  Unity Integration

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  Technical Detail

Inspiration

I want to create a system on the blockchain that visualizes a 'humanity score'.

What it does

Dynamic NFT that utilizes Chainlink VRF, Chainlink Functions, and Chainlink Automation. It leverages the Gitcoin Passport's humanity score to show an android's transformation into a human within the NFT.

How we built it

Dynamic NFT State

• The humanity score affects the growth of the android.
• The random seed value affects accessories like hats and eyeglasses.

Unity for Dynamic NFT

• Dynamic NFTs are rendered using Unity and WebGL.
• Unity fetches data from The Graph and updates the state dynamically.
• The web app and Opensea display the same Unity dynamic NFT using an iframe.

Data Integration Diagram

• Gitcoin Passport as a source for humanity scores.
• Chainlink Functions for integrating humanity scores into NFT smart contracts.
• Chainlink Automation to automate the data fetching process.
• Chainlink VRF for generating random seed values.
• The Graph for data aggregation purposes.
• ENS for managing identity data, such as names and avatars.

Chainlink Integration

The details of Chainlink integration are maintained here.

https://github.com/taijusanagi/link-become-human/blob/main/Docs/Chainlink-Integration.md

Avalanche Integration

The dynamic NFT is deployed Avalanche C-Chain Fuji Testnet.

https://testnet.snowtrace.io/address/0x98d80C7a5338fD211544f1f807D19F9191264Ce0#code-43113

Opensea supports Avalanche C-Chain Fuji Testnet and the asset page is here.

https://testnets.opensea.io/assets/avalanche-fuji/0x98d80C7a5338fD211544f1f807D19F9191264Ce0/1098112484341563293955512077999730492067707

The Graph Integration

The Graph is used in a Unity C# script for data aggregation. https://github.com/taijusanagi/link-become-human/blob/main/Assets/Scripts/GameManager.cs#L122

The following subgraphs are integrated.

• https://api.studio.thegraph.com/proxy/60667/linkbecomehuman/v0.0.1/graphql (New)
• https://api.thegraph.com/subgraphs/name/ensdomains/ens/graphql (Existing one for ENS)

ENS Integration

• The ENS name is fetched by The Graph and displayed in the dynamic NFT.
• The ENS avatar is fetched by Rainbow Kit SDK.

Challenges we ran into

Using some of the Chainlink modules was a new experience for me, so it took time to learn how to use them.

Accomplishments that we're proud of

I have implemented Chainlink Functions, Chainlink VRF, and Chainlink Automation, and have also demonstrated a working dynamic NFT.

What we learned

• Relevant Chainlink modules
• Unity Development
• The Graph Integration

What's next for Link: Become Human

• Add more accessory for random ness
• Make it production

Built With

• avalanche
• chainlink
• ens
• thegraph
• unity