Improve SEP-24 example (#111)

examples/SEP-24/src/main/kotlin/org/stellar/example/Main.kt

@@ -110,28 +110,34 @@ suspend fun main() {
  )
 
  // Send transaction with transfer
- val t = (statusChange.transaction as WithdrawalTransaction)
- val transfer = stellar.transaction(keypair).transferWithdrawalTransaction(t, asset).build()
+ val anchorTransaction = (statusChange.transaction as WithdrawalTransaction)
+ val transfer = stellar.transaction(keypair).transferWithdrawalTransaction(anchorTransaction, asset).build()
 
  transfer.sign(keypair)
 
  stellar.submitTransaction(transfer)
 
+ var terminalStatus: TransactionStatus? = null
+
  do {
  statusChange = withdrawalWatcher.channel.receive()
 
  when (statusChange) {
- is StatusChange ->
- println(
- "Withdrawal transaction status changed to ${statusChange.status}. " +
-  "Message: ${statusChange.transaction.message}"
-  )
+ is StatusChange -> {
+ if (statusChange.status.isTerminal()) {
+ terminalStatus = statusChange.status
+ }
+ }
  is ChannelClosed -> println("Transaction tracking finished")
  is ExceptionHandlerExit ->
  println("Retries exhausted trying obtain transaction data, giving up.")
  }
  } while (statusChange !is ChannelClosed)
 
+ if (terminalStatus != TransactionStatus.COMPLETED) {
+ println("Transaction was not completed")
+ }
+
  println("Successful withdrawal")
 
  wallet.close()