Delphi ActiveX 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 ActiveX

var
success: Integer;
http: TChilkatHttp;
json: TChilkatJsonObject;
sbRequestBody: TChilkatStringBuilder;
privKey: TPrivateKey;
publicKeyId: WideString;
resp: TChilkatHttpResponse;
sbResponseBody: TChilkatStringBuilder;
jResp: TChilkatJsonObject;
respStatusCode: Integer;
chargeId: WideString;
chargePermissionId: WideString;
chargeAmountAmount: WideString;
chargeAmountCurrencyCode: WideString;
captureAmountAmount: WideString;
captureAmountCurrencyCode: WideString;
refundedAmountAmount: WideString;
refundedAmountCurrencyCode: WideString;
convertedAmount: WideString;
conversionRate: WideString;
softDescriptor: WideString;
merchantMetadata: WideString;
providerMetadataProviderReferenceId: WideString;
statusDetailsState: WideString;
statusDetailsReasonCode: WideString;
statusDetailsReasonDescription: WideString;
statusDetailsLastUpdatedTimestamp: WideString;
creationTimestamp: WideString;
expirationTimestamp: WideString;
releaseEnvironment: WideString;

begin
success := 0;

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

http := TChilkatHttp.Create(Self);

//  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 := TChilkatJsonObject.Create(Self);
json.UpdateString('cancellationReason','REASON DESCRIPTION');

sbRequestBody := TChilkatStringBuilder.Create(Self);
json.EmitSb(sbRequestBody.ControlInterface);

//  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 := TPrivateKey.Create(Self);
success := privKey.LoadPemFile('C:/someDir/myAmazonPayPrivateKey.pem');
if (success = 0) then
  begin
    Memo1.Lines.Add(privKey.LastErrorText);
    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 := http.SetAuthPrivateKey(publicKeyId,privKey.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    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

http.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 HttpSb.
//  Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
resp := TChilkatHttpResponse.Create(Self);
success := http.HttpSb('DELETE','https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}/cancel',sbRequestBody.ControlInterface,'utf-8','application/json',resp.ControlInterface);
if (success = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

sbResponseBody := TChilkatStringBuilder.Create(Self);
resp.GetBodySb(sbResponseBody.ControlInterface);
jResp := TChilkatJsonObject.Create(Self);
jResp.LoadSb(sbResponseBody.ControlInterface);
jResp.EmitCompact := 0;

//  If the status code is not equal to 200, this will display error information.
Memo1.Lines.Add('Response Body:');
Memo1.Lines.Add(jResp.Emit());

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