by Identix.Space team
based on TIP 4.2 standard described here
Our goal was to demonstrate the concept of Soulbound tokens proposed in the Decentralized Society: Finding Web3's Soul paper on the Everscale network and show its possible practical application.
- SBT contract. An implementation of Soulbound NFTs on Everscale, publicly visible and non-transferable.
- Soul contract. Identity representation on the network. A Soul is a separate contract that allowed us to lay the possibility of social recovery for the future.
- Collection contract for SBT issuers.
- Demo Web app. We have implemented Soul-based authentication and SBT import functionality.
The solution doesn't rely on centralized storage of SBT data: the frontend interacts with smart contracts directly.
npm install- Use
npm run buildfor compile contracts - Use
npm run deploy:localornpm run deploy:devnetto deploy to devnet or local network
The value of SBTs lies in allowing token issuers to endow a person with specific verifiable attributes. Thus, SBTs are suitable in the following areas:
- Digital Identity (public certificates and achievements)
- Web3 onboarding
We decided to demonstrate the practical value of SBTs using a DEX onboarding use case:
- SBT Issuers distribute their tokens among a certain group of users. In our case following "fake" NFTs are engaged:
- Cross-Chain Master by Octus Bridge
- Experienced Trader Level 5 by Uniswap
- Private Club Member by GrandBazar
- The user presents his SBTs to the Exchange during onboarding to get a premium status with specific bonuses.
- The Exchange can automatically verify the pack of SBTs to make the decision.
All this makes it possible to implement a system of discounts and bonuses for web3 ecosystems in order to engage users and increase the popularity and adoption of target web3 services.
- Social recovery for a Soul
- Collection & SBT issuance UI
- Verification rules
- SBT revocation