Soulbound Tokens (SBTs)

What are SBTs

SBTs are non-transferable unique digital tokens. They are issued once to an address, which could be owned by an individual or entity, stating information or accomplishments about the address owner.

Use-Cases of SBTs:

• Proof Of Personhood, e.g through verification of a phone number.

• Proof Of Attendance, e.g. proofing that an individual attended an event.

• Proof Of Steps Completed e.g. that the owner went through an KYC process successfully.

However, the data stored in SBTs should never include sensible personal information. For that, Verifiable Credentials and mdocs are a much better fit, because here, no sensible data is stored on the blockchain. A privacy requirement in many countries. Read more about it our post about SSI vs. NFTs

Nonetheless, the SBTs offer great utility for many different use-cases, like reputation building and more.

How you can use SBTs with walt.id

Leveraging the walt.id open-source products, you can mint and verify SBTs and create wallet solutions where users can view their digital tokens.

Minting Solution

Deploy SBT smart contracts directly via Java, Kotlin or our REST interface on different EVM chains, thereunder:

• Ethereum

• Polygon

• Shimmer

Deploy your first SBT Smart Contract and start minting SBTs.

Verification Solution

Verify SBT ownership, metadata and more using REST endpoints for common use-cases or more complex ones by creating dynamic verification policies with the Open-Policy-Agent (OPA) and the REGO language.

Start verifying SBTs here or learn about dynamic verification policies with OPA.

Web2 Login

You can also enable Login In Web2 by launching your own decentralised identity provider that can be integrated with popular identity and access management tools like Keycloak or Auth0. Read more about it here.

Wallet Solution

Extend your application with SBT viewing capabilities and web3 login using our wallet-kit.