Skip to main contentKontor uses a hybrid-UTXO model, in which assets can exist one of two states, and move fluidly between them, even within a single block.
Attached state: Assets are “attached” to Bitcoin UTXOs, making them tradeable using standard Bitcoin tools:
- PSBTs (Partially Signed Bitcoin Transactions)
- Bitcoin Script interactions
- Native Bitcoin wallet support
- Atomic swaps with other Bitcoin metaprotocol tokens
Detached state: Assets are “detached” for use in smart contracts:
- Held in contract state
- Subject to programmable logic
- Can be transferred between contracts
- Can cross-contract call with type safety
This hybrid model gives Kontor unique interoperability—assets are first-class Bitcoin citizens while also supporting rich programmable logic. Users can perform single-confirmation atomic swaps between BTC, KOR, and other Bitcoin metaprotocol assets (Ordinals, Runes, Counterparty), or chain a swap directly into a contract call within a single Bitcoin transaction.
Example flow:
- User holds BTC, wants to call a Kontor contract (which requires KOR for gas)
- User constructs a Bitcoin transaction that atomically: swaps BTC → KOR, then calls the contract with KOR
- All happens in one transaction, one confirmation
- No pre-funding, no separate accounts, no bridges
