  This paper propose a protocol for lottery and a protocol for auction on
quantum Blockchain. Our protocol of lottery satisfies randomness,
unpredictability, unforgeability, verifiability, decentralization and
unconditional security. Our protocol of auction satisfies bid privacy,
posterior privacy, bids' binding, decentralization and unconditional security.
Except quantum Block-chain, the main technique involved in both protocols is
quantum bit commitment. Since both quantum blockchain and quantum bit
commitment can be realized by the current technology, our protocols are
practically feasible.
