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

void ChilkatSample(void)
    {
    HCkHttp http;
    BOOL success;
    HCkJsonObject json;
    HCkStringBuilder sbRequestBody;
    HCkPrivateKey privKey;
    const char *publicKeyId;
    HCkHttpResponse resp;
    HCkStringBuilder sbResponseBody;
    HCkJsonObject jResp;
    int respStatusCode;
    const char *chargeId;
    const char *chargePermissionId;
    const char *chargeAmountAmount;
    const char *chargeAmountCurrencyCode;
    const char *captureAmountAmount;
    const char *captureAmountCurrencyCode;
    const char *refundedAmountAmount;
    const char *refundedAmountCurrencyCode;
    const char *convertedAmount;
    const char *conversionRate;
    const char *softDescriptor;
    const char *merchantMetadata;
    const char *providerMetadataProviderReferenceId;
    const char *statusDetailsState;
    const char *statusDetailsReasonCode;
    const char *statusDetailsReasonDescription;
    const char *statusDetailsLastUpdatedTimestamp;
    const char *creationTimestamp;
    const char *expirationTimestamp;
    const char *releaseEnvironment;

    // 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/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"
    // }

    json = CkJsonObject_Create();
    CkJsonObject_UpdateString(json,"cancellationReason","REASON DESCRIPTION");

    sbRequestBody = CkStringBuilder_Create();
    CkJsonObject_EmitSb(json,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.
    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);
        CkStringBuilder_Dispose(sbRequestBody);
        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);
        CkStringBuilder_Dispose(sbRequestBody);
        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
    // Authorization

    CkHttp_putAccept(http,"application/json");

    // Use the actual chargeId here:
    success = CkHttp_SetUrlVar(http,"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
    resp = CkHttp_PTextSb(http,"DELETE","https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}/cancel",sbRequestBody,"utf-8","application/json",FALSE,FALSE);
    if (CkHttp_getLastMethodSuccess(http) == FALSE) {
        printf("%s\n",CkHttp_lastErrorText(http));
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbRequestBody);
        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) {
        printf("Failed.\n");
        CkHttpResponse_Dispose(resp);
        CkHttp_Dispose(http);
        CkJsonObject_Dispose(json);
        CkStringBuilder_Dispose(sbRequestBody);
        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)

    // {
    //   "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.

    chargeId = CkJsonObject_stringOf(jResp,"chargeId");
    chargePermissionId = CkJsonObject_stringOf(jResp,"chargePermissionId");
    chargeAmountAmount = CkJsonObject_stringOf(jResp,"chargeAmount.amount");
    chargeAmountCurrencyCode = CkJsonObject_stringOf(jResp,"chargeAmount.currencyCode");
    captureAmountAmount = CkJsonObject_stringOf(jResp,"captureAmount.amount");
    captureAmountCurrencyCode = CkJsonObject_stringOf(jResp,"captureAmount.currencyCode");
    refundedAmountAmount = CkJsonObject_stringOf(jResp,"refundedAmount.amount");
    refundedAmountCurrencyCode = CkJsonObject_stringOf(jResp,"refundedAmount.currencyCode");
    convertedAmount = CkJsonObject_stringOf(jResp,"convertedAmount");
    conversionRate = CkJsonObject_stringOf(jResp,"conversionRate");
    softDescriptor = CkJsonObject_stringOf(jResp,"softDescriptor");
    merchantMetadata = CkJsonObject_stringOf(jResp,"merchantMetadata");
    providerMetadataProviderReferenceId = CkJsonObject_stringOf(jResp,"providerMetadata.providerReferenceId");
    statusDetailsState = CkJsonObject_stringOf(jResp,"statusDetails.state");
    statusDetailsReasonCode = CkJsonObject_stringOf(jResp,"statusDetails.reasonCode");
    statusDetailsReasonDescription = CkJsonObject_stringOf(jResp,"statusDetails.reasonDescription");
    statusDetailsLastUpdatedTimestamp = CkJsonObject_stringOf(jResp,"statusDetails.lastUpdatedTimestamp");
    creationTimestamp = CkJsonObject_stringOf(jResp,"creationTimestamp");
    expirationTimestamp = CkJsonObject_stringOf(jResp,"expirationTimestamp");
    releaseEnvironment = CkJsonObject_stringOf(jResp,"releaseEnvironment");


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

    }