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