SendTransactionFlow(otherSide: FlowSession, stx: SignedTransaction)
The SendTransactionFlow should be used to send a transaction to another peer that wishes to verify that transaction's integrity by resolving and checking the dependencies as well. The other side should invoke ReceiveTransactionFlow at the right point in the conversation to receive the sent transaction and perform the resolution back-and-forth required to check the dependencies and download any missing attachments.
stx - the SignedTransaction being sent to the otherSideSession.