Delphi DLL Requires Chilkat v11.0.0+

Amazon Pay - Cancel Charge

See more Amazon Pay Examples

Moves Charge to Canceled state and releases any authorized payments. Delphi DLL

var
success: Boolean;
http: HCkHttp;
json: HCkJsonObject;
sbRequestBody: HCkStringBuilder;
privKey: HCkPrivateKey;
publicKeyId: PWideChar;
resp: HCkHttpResponse;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
respStatusCode: Integer;
chargeId: PWideChar;
chargePermissionId: PWideChar;
chargeAmountAmount: PWideChar;
chargeAmountCurrencyCode: PWideChar;
captureAmountAmount: PWideChar;
captureAmountCurrencyCode: PWideChar;
refundedAmountAmount: PWideChar;
refundedAmountCurrencyCode: PWideChar;
convertedAmount: PWideChar;
conversionRate: PWideChar;
softDescriptor: PWideChar;
merchantMetadata: PWideChar;
providerMetadataProviderReferenceId: PWideChar;
statusDetailsState: PWideChar;
statusDetailsReasonCode: PWideChar;
statusDetailsReasonDescription: PWideChar;
statusDetailsLastUpdatedTimestamp: PWideChar;
creationTimestamp: PWideChar;
expirationTimestamp: PWideChar;
releaseEnvironment: PWideChar;

begin
success := False;

//  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) then
  begin
    Memo1.Lines.Add(CkPrivateKey__lastErrorText(privKey));
    Exit;
  end;

//  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.
publicKeyId := 'SANDBOX-AHEGSJCM3L2S637RBGABLAFW';
success := CkHttp_SetAuthPrivateKey(http,publicKeyId,privKey);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

//  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 HttpSb.
//  Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
resp := CkHttpResponse_Create();
success := CkHttp_HttpSb(http,'DELETE','https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}/cancel',sbRequestBody,'utf-8','application/json',resp);
if (success = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

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.
Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(CkJsonObject__emit(jResp));

respStatusCode := CkHttpResponse_getStatusCode(resp);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
if (respStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Failed.');
    Exit;
  end;

//  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

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);
CkHttpResponse_Dispose(resp);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);