net.corda.flows / NotaryFlow / Client / <init>

# <init>

`Client(stx: SignedTransaction)`
`Client(stx: SignedTransaction, progressTracker: ProgressTracker)`

A flow to be used for obtaining a signature from a NotaryService ascertaining the transaction timestamp is correct and none of its inputs have been used in another completed transaction.

### Exceptions

`NotaryException` - in case the any of the inputs to the transaction have been consumed by another transaction or the timestamp is invalid.