Verification SBT

What it is

Verification soul-bound tokens (SBTs) are on-chain records. They state successful zkKYC verifications between a wallet addresses and verifier smart contracts corresponding to a DApp. The soul-bound property means that it can not be transferred. Instead it has to be recreated for another wallet with a new ZKP verification.

The on-chain registry is implemented in an EVM smart contract. Galactica provides a standardized system instance defined here: DevNet: Andromeda In general, also custom registries can be deployed and used.

Purpose

• On-chain record for reference in smart contracts

• Unlocks using DApps requiring compliance without regenerating a ZKP every time

• Carries data about verification

Contents

The data contained in a Verification SBT is defined in the smart contract.

• Wallet address of the user

• Address of the DApp the verification was for

• Verifier Codehash for tracking what version of the verifier was used. This allows upgrading DApp requirements and migrating previous verifications.

• KYC Guardian public key

• Fraud investigation data, see Fraud investigation process