Spring boot paypal INVALID_RESOURCE_ID - spring

Question

I'm trying to implement PayPal's API, but as this is the first time im using it, I get some errors.
This is the code:
Controller
#PostMapping("/checkout/paypal")
public String checkout_paypal(#RequestParam(value = "id") Integer id) throws Exception {
Order order = orderServices.findOrderById(id);
try {
Payment payment = service.createPayment(order.getTotalPrice().doubleValue(), "EUR", "PAYPAL",
"ORDER", "Order id:"+order.getId(), "http://localhost:4200/checkout?id="+order.getId(),
"http://localhost:4200/checkout?id="+order.getId());
for(Links link:payment.getLinks()) {
if(link.getRel().equals("approval_url")) {
return "redirect:"+link.getHref();
}
}
} catch (PayPalRESTException e) {
e.printStackTrace();
}
System.out.println("Success");
return "Success";
}
#GetMapping("/successPaymentPaypal")
public String successPayment(#RequestParam(value = "id") Integer id,#RequestParam(value = "paymentId") String paymentId,#RequestParam(value = "PayerID") String PayerID) throws Exception {
System.out.println(id+" "+paymentId+" "+PayerID);
try {
Payment payment = service.executePayment(paymentId, PayerID);
if(payment.getState().equals("approved")){
Order order = orderServices.findOrderById(id);
order.setOrderState(OrderState.PAID);
orderServices.saveOrder(order);
return "success";
}
} catch (PayPalRESTException e) {
throw new Exception("Error occured while processing payment!");
}
return "Done";
}
Service
#Autowired
private APIContext apiContext;
public Payment createPayment(
Double total,
String currency,
String method,
String intent,
String description,
String cancelUrl,
String successUrl) throws PayPalRESTException {
Amount amount = new Amount();
amount.setCurrency(currency);
total = new BigDecimal(total).setScale(2, RoundingMode.HALF_UP).doubleValue();
amount.setTotal(String.format("%.2f", total));
Transaction transaction = new Transaction();
transaction.setDescription(description);
transaction.setAmount(amount);
List<Transaction> transactions = new ArrayList<>();
transactions.add(transaction);
Payer payer = new Payer();
payer.setPaymentMethod(method.toString());
Payment payment = new Payment();
payment.setIntent(intent.toString());
payment.setPayer(payer);
payment.setTransactions(transactions);
RedirectUrls redirectUrls = new RedirectUrls();
redirectUrls.setCancelUrl(cancelUrl);
redirectUrls.setReturnUrl(successUrl);
payment.setRedirectUrls(redirectUrls);
return payment.create(apiContext);
}
public Payment executePayment(String paymentId, String payerId) throws PayPalRESTException{
Payment payment = new Payment();
payment.setId(paymentId);
PaymentExecution paymentExecute = new PaymentExecution();
paymentExecute.setPayerId(payerId);
return payment.execute(apiContext, paymentExecute);
}
Config
#Value("${paypal.client.id}")
private String clientId;
#Value("${paypal.mode}")
private String paypalMode;
#Value("${paypal.client.secret}")
private String clientSecret;
#Bean
public Map<String, String> paypalSdkConfig(){
Map<String, String> sdkConfig = new HashMap<>();
sdkConfig.put("mode", paypalMode);
return sdkConfig;
}
#Bean
public OAuthTokenCredential authTokenCredential(){
return new OAuthTokenCredential(clientId, clientSecret, paypalSdkConfig());
}
#Bean
public APIContext apiContext() throws PayPalRESTException{
APIContext apiContext = new APIContext(authTokenCredential().getAccessToken());
apiContext.setConfigurationMap(paypalSdkConfig());
return apiContext;
}
This is the error:
Response code: 404 Error response: {"name":"INVALID_RESOURCE_ID","message":"Requested resource ID was not found.","information_link":"https://developer.paypal.com/docs/api/payments/#errors","debug_id":"c2dc1e86af7fe"}
The checkout/paypal dont give any error, and works well i think, it got me redirect to my frontend, where i make second request, but there is when error comes..
I really dont know what is the problem..

Answer 1

It appears you're integrating the old v1/payments API. You should instead integrate using the current v2/checkout/orders.
See the guide at https://developer.paypal.com/docs/checkout/reference/server-integration/
The best approval flow to pair it with is https://developer.paypal.com/demo/checkout/#/pattern/server
With v2/checkout/orders, always use intent:capture unless you have very specific and well-defined business reasons to add an intervening authorization step