(C++) Amazon Pay - Cancel Charge

See more Amazon Pay Examples

Moves Charge to Canceled state and releases any authorized payments.

For more information, see https://developer.amazon.com/docs/amazon-pay-api-v2/charge.html#cancel-charge

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#include <CkHttp.h>
#include <CkJsonObject.h>
#include <CkStringBuilder.h>
#include <CkPrivateKey.h>
#include <CkHttpResponse.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/charges/:chargeId/cancel" \
    // -X DELETE
    // -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
    // -H "x-amz-pay-date:20201012T235046Z"
    // -d '{
    //     "cancellationReason": "REASON DESCRIPTION"
    // }'

    // 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.

    // {
    //   "cancellationReason": "REASON DESCRIPTION"
    // }

    CkJsonObject json;
    json.UpdateString("cancellationReason","REASON DESCRIPTION");

    CkStringBuilder sbRequestBody;
    json.EmitSb(sbRequestBody);

    // 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
    // Authorization

    http.put_Accept("application/json");

    // Use the actual chargeId here:
    success = http.SetUrlVar("chargeId","bd504926-f659-4ad7-a1a9-9a747aaf5275");
    // 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
    CkHttpResponse *resp = http.PTextSb("DELETE","https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}/cancel",sbRequestBody,"utf-8","application/json",false,false);
    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) {
        std::cout << "Failed." << "\r\n";
        delete resp;
        return;
    }

    delete resp;

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

    // {
    //   "chargeId": "P21-1111111-1111111-C111111",
    //   "chargePermissionId": "P21-1111111-1111111",
    //   "chargeAmount": {
    //     "amount": "14.00",
    //     "currencyCode": "USD"
    //   },
    //   "captureAmount": {
    //     "amount": "14.00",
    //     "currencyCode": "USD"
    //   },
    //   "refundedAmount": {
    //     "amount": "0.00",
    //     "currencyCode": "USD"
    //   },
    //   "convertedAmount": "14.00",
    //   "conversionRate": "1.00",
    //   "softDescriptor": "SOFT DESCRIPTOR",
    //   "merchantMetadata": null,
    //   "providerMetadata": {
    //     "providerReferenceId": null
    //   },
    //   "statusDetails": {
    //     "state": "Canceled",
    //     "reasonCode": null,
    //     "reasonDescription": null,
    //     "lastUpdatedTimestamp": "20190714T155300Z"
    //   },
    //   "creationTimestamp": "20190714T155300Z",
    //   "expirationTimestamp": "20190715T155300Z",
    //   "releaseEnvironment": "Sandbox"
    // }

    // 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.

    const char *chargeId = jResp.stringOf("chargeId");
    const char *chargePermissionId = jResp.stringOf("chargePermissionId");
    const char *chargeAmountAmount = jResp.stringOf("chargeAmount.amount");
    const char *chargeAmountCurrencyCode = jResp.stringOf("chargeAmount.currencyCode");
    const char *captureAmountAmount = jResp.stringOf("captureAmount.amount");
    const char *captureAmountCurrencyCode = jResp.stringOf("captureAmount.currencyCode");
    const char *refundedAmountAmount = jResp.stringOf("refundedAmount.amount");
    const char *refundedAmountCurrencyCode = jResp.stringOf("refundedAmount.currencyCode");
    const char *convertedAmount = jResp.stringOf("convertedAmount");
    const char *conversionRate = jResp.stringOf("conversionRate");
    const char *softDescriptor = jResp.stringOf("softDescriptor");
    const char *merchantMetadata = jResp.stringOf("merchantMetadata");
    const char *providerMetadataProviderReferenceId = jResp.stringOf("providerMetadata.providerReferenceId");
    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 *creationTimestamp = jResp.stringOf("creationTimestamp");
    const char *expirationTimestamp = jResp.stringOf("expirationTimestamp");
    const char *releaseEnvironment = jResp.stringOf("releaseEnvironment");
    }