Amount being sent or received (excluding fees).
Total fees for the swap (inc receiver's fees if applicable)
Input Proofs for this transaction.
OptionalkeepBlinding data to construct proofs to keep.
Keyset ID used to prepare the outputs.
OptionalsendBlinding data to construct proofs to send.
OptionalunselectedProofs not selected for this transaction (can be returned to storage).
Preview of a swap transaction created by prepareSend / prepareReceive.