Catamaran Swaps
Trustless swaps between Bitcoin chain and Stacks chain
Friedger Müffke - 16 Sep 2021 - Blockchain Brussels - Citizen Corner
Bitcoin
Value transfer (and storage)
Mining: Energy to coins
Stacks Blockchain
Background: Naming system and own your internet
More programmable Bitcoins with smart contracts
Mining: Bitcoins to coins
Stacking: Earn BTC with STX
Mining
-
Bitcoin (Proof of work)
Miners throw dices until win
Most dices, highest probability to win
-
Stacks (Proof of transfer)
Miners throw Bitcoins until Bitcoin block
Most Bitcoins, highest probability to win
Mining
-
Bitcoin (Proof of work)
Miners throw dices until win
Most dices, highest probability to win
-
Stacks (Proof of transfer)
Miners throw Bitcoins until Bitcoin block
Most Bitcoins, highest probability to win
-
Miami Coin (PoX lite)
Miners throw Stacks until Stacks block
Most Stacks, highest probability to win
Stacks miners know about Bitcoin Blocks
credit: @axopoa
Trustless swaps
- Bitcoin
Transfers
- Stacks
Transfers
Contract calls
Trustless swap
- Seller puts STX or assets into escrow
- Buyer sends BTC to seller
- Buyer submits BTC transaction,
escrow sends STX or assets
Verify BTC transaction
- Provide:
- tx
- Merkle proof
- block header
Verify on-chain: - tx is in proof (hash)
- Merkle root is in block header
- block header hash is in blockchain (lookup)
Swap NFTs, FTs
Mint by Bitcoin Tx
