Cancelling exchange offer

Question

Do you have any commands to cancel the created raw exchange? It would help me with the testing but did not find such commands in multichain or bitcoin API... I'd like to simulate a situation where the first party sends the prepared transaction but the deal gets canceled by the other party not finishing the transaction.

Answer 1

You can use createrawtransaction (with the same txid/vout from preparelockunspent, sending the asset quantity back to yourself) -> signrawtransaction -> sendrawtransaction to spend one of the txid/vouts referenced by the exchange, at which point it will become invalid. 

Answer 2

Alpha 11 adds a new API call disablerawtransaction which takes care of cancelled a raw exchange offer, i.e. preventing it from being used by anyone else.