Terminal Cloud API async: update return type

README.md

@@ -515,6 +515,75 @@ const paymentRequest: SaleToPOIRequest = {
 // Step 5: Make the request
 const terminalApiResponse: terminal.TerminalApiResponse = await terminalLocalAPI.request(paymentRequest);
 ```
+### Using the Cloud Terminal API Integration (async)
+If you choose to integrate [Terminal API over Cloud](https://docs.adyen.com/point-of-sale/design-your-integration/choose-your-architecture/cloud/) **asynchronously**, you need to follow similar steps to initialize the client and prepare the request object. However the response will be asynchronous:
+* a successful request will return `200` status code and `ok` as response body. Make sure to setup the [event notifications](https://docs.adyen.com/point-of-sale/design-your-integration/notifications/event-notifications/)
+* a request that fails will return `200` status code and the `TerminalApiResponse` as response body
+``` typescript
+// Step 1: Require the parts of the module you want to use
+const {Client, TerminalCloudAPI} from "@adyen/api-library";
+
+// Step 2: Initialize the client object
+const client = new Client({apiKey: "YOUR_API_KEY", environment: "TEST"});
+
+// Step 3: Initialize the API object
+const terminalCloudAPI = new TerminalCloudAPI(client);
+
+// Step 4: Create the request object
+const serviceID = "123456789";
+const saleID = "POS-SystemID12345";
+const POIID = "Your Device Name(eg V400m-123456789)";
+
+// Use a unique transaction for every transaction you perform
+const transactionID = "TransactionID";
+const paymentRequest: SaleToPOIRequest = {
+    MessageHeader: {
+        MessageClass: MessageClassType.Service,
+        MessageCategory: MessageCategoryType.Payment,
+        MessageType: MessageType.Request,
+        ProtocolVersion: "3.0",
+        ServiceID: serviceID,
+        SaleID: saleID,
+        POIID: POIID
+    },
+    PaymentRequest: {
+        SaleData: {
+            SaleTransactionID: {
+                TransactionID: transactionID,
+                TimeStamp: new Date().toISOString()
+            },
+
+            SaleToAcquirerData: {
+                applicationInfo: {
+                    merchantApplication: {
+                        version: "1",
+                        name: "test",
+                    }
+                }
+            }
+        },
+        PaymentTransaction: {
+            AmountsReq: {
+                Currency: "EUR",
+                RequestedAmount: 1000
+            }
+        }
+    }
+};
+
+// Step 5: Make the request
+const response = await terminalCloudAPI.async(paymentRequest);
+// handle both `string` and `TerminalApiResponse`
+if (typeof response === "string") {
+  // request was successful
+  console.log("response:", response); // should be 'ok'
+} else {
+  // request failed: see details in the EventNotification object
+  console.log("EventToNotify:", response.SaleToPOIRequest?.EventNotification?.EventToNotify);
+  console.log("EventDetails:", response.SaleToPOIRequest?.EventNotification?.EventDetails);
+}
+```
+
 ## Feedback
 We value your input! Help us enhance our API Libraries and improve the integration experience by providing your feedback. Please take a moment to fill out [our feedback form](https://forms.gle/A4EERrR6CWgKWe5r9) to share your thoughts, suggestions or ideas. 
 

src/__mocks__/terminalApi/async.ts

@@ -18,3 +18,25 @@
  */
 
 export const asyncRes = "ok";
+
+export const asyncErrorRes = {
+    SaleToPOIRequest: {
+        EventNotification: {
+            EventToNotify: "Reject",
+            EventDetails: "message=Did+not+receive+a+response+from+the+POI.",
+            RejectedMessage: "ewoi...0KfQo=",
+            TimeStamp: "2020-03-31T10:28:39.515Z"
+        },
+        MessageHeader: {
+            DeviceID: "666568147",
+            MessageCategory: "Event",
+            MessageClass: "Event",
+            MessageType: "Notification",
+            POIID: "P400Plus-123456789",
+            ProtocolVersion: "3.0",
+            SaleID: "saleid-4c32759faaa7",
+            ServiceID: "31122609"
+        }
+    }
+};
+

src/__tests__/terminalCloudAPI.spec.ts

@@ -1,6 +1,6 @@
 import nock from "nock";
 import { createClient, createTerminalAPIPaymentRequest, createTerminalAPIRefundRequest } from "../__mocks__/base";
-import { asyncRes } from "../__mocks__/terminalApi/async";
+import { asyncRes, asyncErrorRes } from "../__mocks__/terminalApi/async";
 import { syncRefund, syncRes, syncResEventNotification, syncResEventNotificationWithAdditionalAttributes, syncResEventNotificationWithUnknownEnum } from "../__mocks__/terminalApi/sync";
 import Client from "../client";
 import TerminalCloudAPI from "../services/terminalCloudAPI";
@@ -30,11 +30,27 @@ describe("Terminal Cloud API", (): void => {
 
         const terminalAPIPaymentRequest = createTerminalAPIPaymentRequest();
 
-        const requestResponse: string = await terminalCloudAPI.async(terminalAPIPaymentRequest);
+        const requestResponse = await terminalCloudAPI.async(terminalAPIPaymentRequest);
 
+        expect(typeof requestResponse).toBe("string");
         expect(requestResponse).toEqual("ok");
     });
 
+    test("should get an error after async payment request", async (): Promise<void> => {
+        scope.post("/async").reply(200, asyncErrorRes);
+
+        const terminalAPIPaymentRequest = createTerminalAPIPaymentRequest();
+
+        const requestResponse = await terminalCloudAPI.async(terminalAPIPaymentRequest);
+
+        if (typeof requestResponse === "object") {
+          expect(requestResponse.SaleToPOIRequest?.EventNotification).toBeDefined();
+          expect(requestResponse.SaleToPOIRequest?.EventNotification?.EventToNotify).toBe("Reject");
+        } else {
+          throw new Error("Expected structured response, but got raw string");
+        }        
+    });
+
     test("should make a sync payment request", async (): Promise<void> => {
         scope.post("/sync").reply(200, syncRes);
 
@@ -453,4 +469,3 @@ export const syncTerminalPaymentResponse = {
     }
   }
 };
-

src/helpers/getJsonResponse.ts

@@ -19,8 +19,36 @@
 
 import Resource from "../services/resource";
 import { IRequest } from "../typings/requestOptions";
+import { TerminalApiResponse } from "../typings/terminal/models";
 
-async function getJsonResponse<T>(resource: Resource, jsonRequest: T | string, requestOptions?: IRequest.Options): Promise<string>;
+/**
+ * Sends a JSON request to the given resource and returns a string or a deserialized `TerminalApiResponse`.
+ * Used by Terminal API /async method
+ * 
+ * @template T The request type (usually a model or plain object).
+ * @param {Resource} resource - The API resource to which the request is sent.
+ * @param {T | string} jsonRequest - The request payload, either as an object or raw JSON string.
+ * @param {IRequest.Options} [requestOptions] - Optional HTTP request options.
+ * @returns {Promise<string | TerminalApiResponse>} A promise resolving to either a raw response string or a `TerminalApiResponse` object.
+ *
+ * @example
+ * const response = await getJsonResponse<TerminalApiRequest>(terminalApiResource, request);
+ */
+async function getJsonResponse<T>(resource: Resource, jsonRequest: T | string, requestOptions?: IRequest.Options): Promise<string | TerminalApiResponse>;
+/**
+ * Sends a JSON request to the given resource and returns a deserialized response of the expected type.
+ * Used by all APIs and Terminal API sync method 
+ *
+ * @template T The request type.
+ * @template R The expected deserialized response type.
+ * @param {Resource} resource - The API resource to which the request is sent.
+ * @param {T | string} jsonRequest - The request payload, either as an object or raw JSON string.
+ * @param {IRequest.Options} [requestOptions] - Optional HTTP request options.
+ * @returns {Promise<R>} A promise resolving to the deserialized response object.
+ *
+ * @example
+ * const response = await getJsonResponse<MyRequestType, MyResponseType>(resource, request);
+ */
 async function getJsonResponse<T, R>(resource: Resource, jsonRequest: T | string, requestOptions?: IRequest.Options): Promise<R>;
 
 /**

src/services/terminalCloudAPI.ts

@@ -40,23 +40,34 @@ class TerminalCloudAPI extends Service {
     private static setApplicationInfo(request: TerminalApiRequest): TerminalApiRequest {
         if (request.SaleToPOIRequest.PaymentRequest) {
             const applicationInfo = new ApplicationInfo();
-            const saleToAcquirerData = {applicationInfo};
-            const saleData = {saleToAcquirerData};
-            const paymentRequest = {saleData};
-            const saleToPOIRequest = {paymentRequest};
-            const reqWithAppInfo = {saleToPOIRequest};
+            const saleToAcquirerData = { applicationInfo };
+            const saleData = { saleToAcquirerData };
+            const paymentRequest = { saleData };
+            const saleToPOIRequest = { paymentRequest };
+            const reqWithAppInfo = { saleToPOIRequest };
 
             mergeDeep(request, reqWithAppInfo);
         }
 
         return ObjectSerializer.serialize(request, "TerminalApiRequest");
     }
 
-    public async(terminalApiRequest: TerminalApiRequest): Promise<string> {
+    /**
+     * Send an asynchronous payment request to the Terminal API.
+     *
+     * @param terminalApiRequest - The request to send.
+     * @returns A promise that resolves to "ok" if the request was successful, or a TerminalApiResponse if there is an error.
+     */
+    public async(terminalApiRequest: TerminalApiRequest): Promise<string | TerminalApiResponse> {
         const request = TerminalCloudAPI.setApplicationInfo(terminalApiRequest);
         return getJsonResponse<TerminalApiRequest>(this.terminalApiAsync, request);
     }
 
+    /**
+     * Send a synchronous payment request to the Terminal API.
+     * @param terminalApiRequest - The request to send.
+     * @returns A promise that resolves to a TerminalApiResponse.
+     */
     public async sync(terminalApiRequest: TerminalApiRequest): Promise<TerminalApiResponse> {
         const request = TerminalCloudAPI.setApplicationInfo(terminalApiRequest);
         const response = await getJsonResponse<TerminalApiRequest, TerminalApiResponse>(