(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 <C_CkHttp.h>
#include <C_CkJsonObject.h>
#include <C_CkPrivateKey.h>
#include <C_CkHttpResponse.h>
#include <C_CkStringBuilder.h>

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject json;
    HCkPrivateKey privKey;
    const char *publicKeyId;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    BOOL nullVal;
    const char *checkoutSessionId;
    const char *webCheckoutDetails;
    const char *chargePermissionType;
    const char *recurringMetadata;
    const char *productType;
    const char *paymentDetails;
    const char *merchantMetadata;
    const char *supplementaryData;
    const char *buyer;
    const char *billingAddress;
    const char *statusDetailsState;
    const char *statusDetailsReasonCode;
    const char *statusDetailsReasonDescription;
    const char *statusDetailsLastUpdatedTimestamp;
    const char *shippingAddress;
    const char *platformId;
    const char *chargePermissionId;
    const char *chargeId;
    const char *creationTimestamp;
    const char *expirationTimestamp;
    const char *storeId;
    const char *deliverySpecifications;
    const char *providerMetadata;
    const char *releaseEnvironment;
    int i;
    int count_i;

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

    http = CkHttp_Create();

    // 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"
    //   }
    // }

    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"chargeAmount.amount","14.00");
    CkJsonObject_UpdateString(json,"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.
    privKey = CkPrivateKey_Create();
    success = CkPrivateKey_LoadPemFile(privKey,"C:/someDir/myAmazonPayPrivateKey.pem");
    if (success == FALSE) {
        printf("%s\n",CkPrivateKey_lastErrorText(privKey));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkPrivateKey_Dispose(privKey);
        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
    publicKeyId = "SANDBOX-AHEGSJCM3L2S637RBGABLAFW";
    success = CkHttp_SetAuthPrivateKey(http,publicKeyId,privKey);
    if (success == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkPrivateKey_Dispose(privKey);
        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

    CkHttp_putAccept(http,"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 = CkHttp_SetUrlVar(http,"sessionId","62b7d028-6c7c-4a43-b077-3897dff27c5b");
    resp = CkHttp_PostJson3(http,"https://pay-api.amazon.eu/sandbox/v2/checkoutSessions/{$sessionId}/complete","application/json",json);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkPrivateKey_Dispose(privKey);
        return;
    }

    sbResponseBody = CkStringBuilder_Create();
    CkHttpResponse_GetBodySb(resp,sbResponseBody);
    jResp = CkJsonObject_Create();
    CkJsonObject_LoadSb(jResp,sbResponseBody);
    CkJsonObject_putEmitCompact(jResp,FALSE);

    // If the status code is not equal to 200, this will display error information.
    printf("Response Body:\n");
    printf("%s\n",CkJsonObject_emit(jResp));

    respStatusCode = CkHttpResponse_getStatusCode(resp);
    printf("Response Status Code = %d\n",respStatusCode);
    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"
        // 	}

        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkPrivateKey_Dispose(privKey);
        CkStringBuilder_Dispose(sbResponseBody);
        CkJsonObject_Dispose(jResp);
        return;
    }

    CkHttpResponse_Dispose(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.

    checkoutSessionId = CkJsonObject_stringOf(jResp,"checkoutSessionId");
    webCheckoutDetails = CkJsonObject_stringOf(jResp,"webCheckoutDetails");
    chargePermissionType = CkJsonObject_stringOf(jResp,"chargePermissionType");
    recurringMetadata = CkJsonObject_stringOf(jResp,"recurringMetadata");
    productType = CkJsonObject_stringOf(jResp,"productType");
    paymentDetails = CkJsonObject_stringOf(jResp,"paymentDetails");
    merchantMetadata = CkJsonObject_stringOf(jResp,"merchantMetadata");
    supplementaryData = CkJsonObject_stringOf(jResp,"supplementaryData");
    buyer = CkJsonObject_stringOf(jResp,"buyer");
    billingAddress = CkJsonObject_stringOf(jResp,"billingAddress");
    statusDetailsState = CkJsonObject_stringOf(jResp,"statusDetails.state");
    statusDetailsReasonCode = CkJsonObject_stringOf(jResp,"statusDetails.reasonCode");
    statusDetailsReasonDescription = CkJsonObject_stringOf(jResp,"statusDetails.reasonDescription");
    statusDetailsLastUpdatedTimestamp = CkJsonObject_stringOf(jResp,"statusDetails.lastUpdatedTimestamp");
    shippingAddress = CkJsonObject_stringOf(jResp,"shippingAddress");
    platformId = CkJsonObject_stringOf(jResp,"platformId");
    chargePermissionId = CkJsonObject_stringOf(jResp,"chargePermissionId");
    chargeId = CkJsonObject_stringOf(jResp,"chargeId");
    creationTimestamp = CkJsonObject_stringOf(jResp,"creationTimestamp");
    expirationTimestamp = CkJsonObject_stringOf(jResp,"expirationTimestamp");
    storeId = CkJsonObject_stringOf(jResp,"storeId");
    deliverySpecifications = CkJsonObject_stringOf(jResp,"deliverySpecifications");
    providerMetadata = CkJsonObject_stringOf(jResp,"providerMetadata");
    releaseEnvironment = CkJsonObject_stringOf(jResp,"releaseEnvironment");
    i = 0;
    count_i = CkJsonObject_SizeOfArray(jResp,"paymentPreferences");
    while (i < count_i) {
        CkJsonObject_putI(jResp,i);
        nullVal = CkJsonObject_IsNullOf(jResp,"paymentPreferences[i]");
        i = i + 1;
    }

    i = 0;
    count_i = CkJsonObject_SizeOfArray(jResp,"constraints");
    while (i < count_i) {
        CkJsonObject_putI(jResp,i);
        nullVal = CkJsonObject_IsNullOf(jResp,"constraints[i]");
        i = i + 1;
    }



    CkHttp_Dispose(http);
    CkJsonObject_Dispose(json);
    CkPrivateKey_Dispose(privKey);
    CkStringBuilder_Dispose(sbResponseBody);
    CkJsonObject_Dispose(jResp);

    }