(C++) Amazon Pay - Complete Checkout Session

See more Amazon Pay Examples

Complete Checkout Session after the buyer returns to checkoutResultReturnUrl to finalize the paymentIntent.

For more information, see https://developer.amazon.com/docs/amazon-pay-api-v2/checkout-session.html#complete-checkout-session

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#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkPrivateKey.h>
#include <CkHttpResponse.h>
#include <CkStringBuilder.h>

void ChilkatSample(void)
    {
    // This example assumes the Chilkat API to have been previously unlocked.
    // See Global Unlock Sample for sample code.

    CkHttp http;
    bool success;

    // Implements the following CURL command:

    // curl "https://pay-api.amazon.com/:version/checkoutSessions/:checkoutSessionId/complete" \
    // -X POST
    // -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
    // -H "x-amz-pay-date:20201012T235046Z"
    // -H "x-amz-pay-idempotency-key:AVLo5tI10BHgEk2jEXAMPLEKEY"
    // -d '{
    //     "chargeAmount": {
    //         "amount": "14.00",
    //         "currencyCode": "USD"
    //     }
    // }'

    // Use the following online tool to generate HTTP code from a CURL command
    // Convert a cURL Command to HTTP Source Code

    // Use this online tool to generate code from sample JSON:
    // Generate Code to Create JSON

    // The following JSON is sent in the request body.

    // {
    //   "chargeAmount": {
    //     "amount": "14.00",
    //     "currencyCode": "USD"
    //   }
    // }

    CkJsonObject json;
    json.UpdateString("chargeAmount.amount","14.00");
    json.UpdateString("chargeAmount.currencyCode","USD");

    // Load your Amazon Pay private key.  
    // There are many other ways to load private keys into the Chilkat private key object, such as from different formats,
    // or from in-memory strings or bytes.
    CkPrivateKey privKey;
    success = privKey.LoadPemFile("C:/someDir/myAmazonPayPrivateKey.pem");
    if (success == false) {
        std::cout << privKey.lastErrorText() << "\r\n";
        return;
    }

    // Provide your Amazon Pay private key and Public Key ID 
    // Use your public key ID here.  It must be the one associated with the private key.
    // Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
    const char *publicKeyId = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW";
    success = http.SetAuthPrivateKey(publicKeyId,privKey);
    if (success == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    // Note: When the private key is provided as shown above, Chilkat will automatically add the required x-amz-pay-* headers to the HTTP request,
    // and will also sign the request.  Nothing more is needed.
    // Chilkat automatically generates and adds the following headers:
    // 
    // x-amz-pay-date
    // x-amz-pay-host
    // x-amz-pay-region
    // x-amz-pay-idempotency-key
    // Authorization

    http.put_Accept("application/json");

    // To use the live system, replace "sandbox" with "live" in the URL passed to PTextSb.
    // Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
    success = http.SetUrlVar("sessionId","62b7d028-6c7c-4a43-b077-3897dff27c5b");
    CkHttpResponse *resp = http.PostJson3("https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{$sessionId}/complete","application/json",json);
    if (http.get_LastMethodSuccess() == false) {
        std::cout << http.lastErrorText() << "\r\n";
        return;
    }

    CkStringBuilder sbResponseBody;
    resp->GetBodySb(sbResponseBody);
    CkJsonObject jResp;
    jResp.LoadSb(sbResponseBody);
    jResp.put_EmitCompact(false);

    // If the status code is not equal to 200, this will display error information.
    std::cout << "Response Body:" << "\r\n";
    std::cout << jResp.emit() << "\r\n";

    int respStatusCode = resp->get_StatusCode();
    std::cout << "Response Status Code = " << respStatusCode << "\r\n";
    if (respStatusCode != 200) {

        // A sample response body for the case where the session ID does not exist:
        // 	{
        // 	  "reasonCode": "ResourceNotFound",
        // 	  "message": "Resource you are trying to access is not available. Requested path '/sandbox/v2/checkoutSessions/bd504926-f659-4ad7-a1a9-9a747aaf5275'"
        // 	}

        // Another sample failure response (status code = 422)
        // 	{
        // 	  "reasonCode": "InvalidCheckoutSessionStatus",
        // 	  "message": "You tried to call an operation on a Checkout Session that is in a state where that operation is not allowed"
        // 	}

        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;

    // Sample JSON response:
    // (Sample code for parsing the JSON response is shown below)

    // {
    //   "checkoutSessionId": "bd504926-f659-4ad7-a1a9-9a747aaf5275",
    //   "webCheckoutDetails": null,
    //   "chargePermissionType": "OneTime",
    //   "recurringMetadata": null,
    //   "productType": null,
    //   "paymentDetails": null,
    //   "merchantMetadata": null,
    //   "supplementaryData": null,
    //   "buyer": null,
    //   "billingAddress": null,
    //   "paymentPreferences": [
    //     null
    //   ],
    //   "statusDetails": {
    //     "state": "Completed",
    //     "reasonCode": null,
    //     "reasonDescription": null,
    //     "lastUpdatedTimestamp": "20191015T204327Z"
    //   },
    //   "shippingAddress": null,
    //   "platformId": null,
    //   "chargePermissionId": "S01-5105180-3221187",
    //   "chargeId": "S01-5105180-3221187-C056351",
    //   "constraints": [
    //     null
    //   ],
    //   "creationTimestamp": "20191015T204313Z",
    //   "expirationTimestamp": null,
    //   "storeId": null,
    //   "deliverySpecifications": null,
    //   "providerMetadata": null,
    //   "releaseEnvironment": null
    // }

    // Sample code for parsing the JSON response...
    // Use the following online tool to generate parsing code from sample JSON:
    // Generate Parsing Code from JSON

    // Chilkat functions returning "const char *" return a pointer to temporary internal memory owned and managed by Chilkat.
    // See this example explaining how this memory should be used: const char * functions.

    bool nullVal;

    const char *checkoutSessionId = jResp.stringOf("checkoutSessionId");
    const char *webCheckoutDetails = jResp.stringOf("webCheckoutDetails");
    const char *chargePermissionType = jResp.stringOf("chargePermissionType");
    const char *recurringMetadata = jResp.stringOf("recurringMetadata");
    const char *productType = jResp.stringOf("productType");
    const char *paymentDetails = jResp.stringOf("paymentDetails");
    const char *merchantMetadata = jResp.stringOf("merchantMetadata");
    const char *supplementaryData = jResp.stringOf("supplementaryData");
    const char *buyer = jResp.stringOf("buyer");
    const char *billingAddress = jResp.stringOf("billingAddress");
    const char *statusDetailsState = jResp.stringOf("statusDetails.state");
    const char *statusDetailsReasonCode = jResp.stringOf("statusDetails.reasonCode");
    const char *statusDetailsReasonDescription = jResp.stringOf("statusDetails.reasonDescription");
    const char *statusDetailsLastUpdatedTimestamp = jResp.stringOf("statusDetails.lastUpdatedTimestamp");
    const char *shippingAddress = jResp.stringOf("shippingAddress");
    const char *platformId = jResp.stringOf("platformId");
    const char *chargePermissionId = jResp.stringOf("chargePermissionId");
    const char *chargeId = jResp.stringOf("chargeId");
    const char *creationTimestamp = jResp.stringOf("creationTimestamp");
    const char *expirationTimestamp = jResp.stringOf("expirationTimestamp");
    const char *storeId = jResp.stringOf("storeId");
    const char *deliverySpecifications = jResp.stringOf("deliverySpecifications");
    const char *providerMetadata = jResp.stringOf("providerMetadata");
    const char *releaseEnvironment = jResp.stringOf("releaseEnvironment");
    int i = 0;
    int count_i = jResp.SizeOfArray("paymentPreferences");
    while (i < count_i) {
        jResp.put_I(i);
        nullVal = jResp.IsNullOf("paymentPreferences[i]");
        i = i + 1;
    }

    i = 0;
    count_i = jResp.SizeOfArray("constraints");
    while (i < count_i) {
        jResp.put_I(i);
        nullVal = jResp.IsNullOf("constraints[i]");
        i = i + 1;
    }
    }