Getting Transaction Number from AdaptivePayments - paypal

Question

This is an update to a previous question I had. Given that the entire problem of that question has changed, I felt it warranted a more accurate and detailed question. Here is my code:
SetupPayment()
public PayResponse SetupPayment(string receiverEmail, decimal amountToPay)
{
ReceiverList receiverList = new ReceiverList { receiver = new List<Receiver>() };
Receiver receiver = new Receiver(amountToPay) { email = receiverEmail };
receiverList.receiver.Add(receiver);
RequestEnvelope requestEnvelope = new RequestEnvelope("en_US");
const string actionType = "CREATE";
const string returnUrl = "https://devtools-paypal.com/guide/ap_implicit_payment/dotnet?success=true";
const string cancelUrl = "https://devtools-paypal.com/guide/ap_implicit_payment/dotnet?cancel=true";
const string currencyCode = "USD";
PayRequest payRequest = new PayRequest(
requestEnvelope,
actionType,
cancelUrl,
currencyCode,
receiverList,
returnUrl)
{
senderEmail = ConfigurationManager.AppSettings["PayPalSenderEmail"]
};
AdaptivePaymentsService adaptivePaymentService = new AdaptivePaymentsService(_payPalConfig);
PayResponse payResponse = adaptivePaymentService.Pay(payRequest);
return payResponse;
}
ExecutePayment()
public ExecutePaymentResponse ExecutePayment(string payKey)
{
RequestEnvelope requestEnvelope = new RequestEnvelope("en_US");
ExecutePaymentRequest executePaymentRequest = new ExecutePaymentRequest(requestEnvelope, payKey);
AdaptivePaymentsService adaptivePaymentsService = new AdaptivePaymentsService(_payPalConfig);
ExecutePaymentResponse executePaymentResponse = adaptivePaymentsService.ExecutePayment(executePaymentRequest);
return executePaymentResponse;
}
Calling Those Functions
PayResponse payResponse = payPalAdapter.SetupPayment(payPalUserEmail, commissionAmount);
if (payResponse.responseEnvelope.ack.ToString() == "SUCCESS")
{
ExecutePaymentResponse executePaymentResponse = payPalAdapter.ExecutePayment(payResponse.payKey);
}
My question is - how can I retrieve the Transaction Number/ID of the payment that was created in SetupPayment() & executed in ExecutePayment()? The only mention of it I see in the Adaptive Payments API is saying that the transaction number is in the IPN Message...but is getting the transaction number really only possible through IPN?

Answer 1

Call PaymentDetails after you execute the payment. The response should have the transaction IDs (paymentInfoList.paymentInfo(0).transactionId for the receiver's transaction ID, or paymentInfoList.paymentInfo(n).senderTransactionId for the sender's transaction ID).