the transaction that contains the init_transfer operation for the transfer to apply
the index of the transfer operation inside the initTransferTx transaction
the transaction that was submitted to the previous chain hop on the path which contains the transfer to apply
the index inside the tx object at which the transfer to 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.complete_transferoperation