SBT (Soul-Bound Token)
Non-transferable NFT permanently bound to an address: used as reputation badges, hackathon prizes, contributor tiers. In the TON ecosystem, SBTs are used by TON Society.
Aliases: sbt, soul-bound token, non-transferable nft, badge
SBT (Soul-Bound Token) is a non-transferable NFT standard. The contract explicitly forbids transfer, so the token stays on the recipient’s address forever. Used as on-chain reputation, proof of participation, or a badge.
Where it’s used
- TON Society — member/contributor tiers issued for ecosystem contributions.
- Hackathon SBTs — prizes and certificates from TON hackathons.
- KYC-lite — proof of having passed verification without revealing the data itself.
- Allowlist tokens — guaranteed launchpad allocation.
Properties
- Cannot be transferred; cannot be resold on NFT marketplaces.
- But anyone can see an SBT on an address → doxxing risk if the address ties to a real identity.
- Burn / revocation can be encoded in the contract — e.g. badge revoked on policy violation.
SBT vs NFT
| Property | NFT | SBT |
|---|---|---|
| Transfer | Yes | No |
| Floor price / resale | Yes | No |
| Identity proof | Weak | Strong |
| Use cases | Collecting, gaming | Reputation, gating |