the transaction that contains the init_transfer operation for the transfer to un-apply
the index of the transfer operation inside the initTransferTx
transaction
the transaction that was submitted to this chain and which contains the transfer to un-apply
the index inside the tx
object at which the transfer to un-apply can be found
the index of the current chain on the path
Builds an operation object that can be used to call
ft4.crosschain.unapply_transfer
operation