Delphi DLL

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. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Http, StringBuilder, PrivateKey, JsonObject;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
http: HCkHttp;
privKey: HCkPrivateKey;
publicKeyId: PWideChar;
respStatusCode: Integer;
sbResponseBody: HCkStringBuilder;
jResp: HCkJsonObject;
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"
//  -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 := 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.
// Note: The SetAuthPrivateKey method was added in Chilkat v9.5.0.89
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');

respStatusCode := 0;

sbResponseBody := CkStringBuilder_Create();
success := CkHttp_SetUrlVar(http,'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 := CkHttp_QuickGetSb(http,'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 := CkHttp_getLastStatus(http);
    if (respStatusCode <> 0) then
      begin
        Memo1.Lines.Add('Response Status Code = ' + IntToStr(respStatusCode));
        Memo1.Lines.Add('Response body:');
        Memo1.Lines.Add(CkHttp__lastResponseBody(http));
      end
    else
      begin
        Memo1.Lines.Add(CkHttp__lastErrorText(http));
      end;
    Exit;
  end;

jResp := CkJsonObject_Create();
CkJsonObject_LoadSb(jResp,sbResponseBody);
CkJsonObject_putEmitCompact(jResp,False);

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

respStatusCode := CkHttp_getLastStatus(http);
Memo1.Lines.Add('Response Status Code = ' + IntToStr(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
    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": "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 := 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);
CkPrivateKey_Dispose(privKey);
CkStringBuilder_Dispose(sbResponseBody);
CkJsonObject_Dispose(jResp);

end;