Lazarus Pascal

Amazon Pay - Get Charge

See more Amazon Pay Examples

Get Charge details such as charge amount and authorization state. Use this operation to determine if authorization or capture was successful. Lazarus Pascal

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.Http,
  Chilkat.StringBuilder,
  Chilkat.PrivateKey,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  http: THttp;
  privKey: TPrivateKey;
  publicKeyId: string;
  respStatusCode: Integer;
  sbResponseBody: TStringBuilder;
  jResp: TJsonObject;
  chargeId: string;
  chargePermissionId: string;
  chargeAmountAmount: string;
  chargeAmountCurrencyCode: string;
  captureAmountAmount: string;
  captureAmountCurrencyCode: string;
  refundedAmountAmount: string;
  refundedAmountCurrencyCode: string;
  convertedAmount: string;
  conversionRate: string;
  softDescriptor: string;
  merchantMetadata: string;
  providerMetadataProviderReferenceId: string;
  statusDetailsState: string;
  statusDetailsReasonCode: string;
  statusDetailsReasonDescription: string;
  statusDetailsLastUpdatedTimestamp: string;
  creationTimestamp: string;
  expirationTimestamp: string;
  releaseEnvironment: string;

begin
  success := False;

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

  http := THttp.Create;

  //  Implements the following CURL command:

  //  curl "https://pay-api.amazon.com/:version/charges/:chargeId"
  //   -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
  //   -H "x-amz-pay-date:20201012T235046Z"
  //   -X GET

  //  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;
  success := privKey.LoadPemFile('C:/someDir/myAmazonPayPrivateKey.pem');
  if (success = False) then
    begin
      WriteLn(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.
  //  Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
  publicKeyId := 'SANDBOX-AHEGSJCM3L2S637RBGABLAFW';
  success := http.SetAuthPrivateKey(publicKeyId,privKey);
  if (success = False) then
    begin
      WriteLn(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';

  respStatusCode := 0;

  sbResponseBody := TStringBuilder.Create;
  success := http.SetUrlVar('chargeId','P21-1111111-1111111');
  //  To use the live system, replace "sandbox" with "live" in the URL passed to QuickGetSb.
  //  Also, make sure to use the correct region: pay-api.amazon.com, pay-api.amazon.eu, or pay-api.amazon.jp
  success := http.QuickGetSb('https://pay-api.amazon.eu/sandbox/v2/charges/{$chargeId}',sbResponseBody);
  if (success = False) then
    begin
      //  If the LastStatus is not equal to 0, then we received a response, but it was an error response.
      respStatusCode := http.LastStatus;
      if (respStatusCode <> 0) then
        begin
          WriteLn('Response Status Code = ' + respStatusCode);
          WriteLn('Response body:');
          WriteLn(http.LastResponseBody);
        end
      else
        begin
          WriteLn(http.LastErrorText);
        end;
      Exit;
    end;

  jResp := TJsonObject.Create;
  jResp.LoadSb(sbResponseBody);
  jResp.EmitCompact := False;

  WriteLn('Response Body:');
  WriteLn(jResp.Emit());

  respStatusCode := http.LastStatus;
  WriteLn('Response Status Code = ' + respStatusCode);
  //  We expect a 200 status code for success.
  //  Note: Some Amazon Pay API calls return 200 for success, others return 201.
  if (respStatusCode <> 200) then
    begin
      WriteLn('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": "Descriptor",
  //       "merchantMetadata": null,
  //       "providerMetadata": {
  //           "providerReferenceId": null
  //       },
  //       "statusDetails":{
  //           "state": "Captured",
  //           "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');


  http.Free;
  privKey.Free;
  sbResponseBody.Free;
  jResp.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.