Delphi DLL

Amazon Pay - Get Refund

See more Amazon Pay Examples

Get refund details. 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;
refundId: PWideChar;
chargeId: PWideChar;
refundAmountAmount: PWideChar;
refundAmountCurrencyCode: PWideChar;
softDescriptor: PWideChar;
creationTimestamp: PWideChar;
statusDetailsState: PWideChar;
statusDetailsReasonCode: PWideChar;
statusDetailsReasonDescription: PWideChar;
statusDetailsLastUpdatedTimestamp: 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/refunds/:refundId" \
// -X GET
// -H "authorization:Px2e5oHhQZ88vVhc0DO%2FsShHj8MDDg%3DEXAMPLESIGNATURE"
// -H "x-amz-pay-date:20201012T235046Z"

// 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');

respStatusCode := 0;

sbResponseBody := CkStringBuilder_Create();
success := CkHttp_SetUrlVar(http,'refundId','S01-5105180-3221187-R022311');
// 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/refunds/{$refundId}',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)

// {
//      "refundId": "S01-5105180-3221187-R022311",
//      "chargeId": "S01-5105180-3221187-C056351",
//      "refundAmount": {
//          "amount": "14.00",
//          "currencyCode": "USD"
//      },
//      "softDescriptor": "Descriptor",
//      "creationTimestamp": "20190714T155300Z",
//      "statusDetails": {
//          "state": "Refunded",
//          "reasonCode": null,
//          "reasonDescription": null,
//          "lastUpdatedTimestamp": "20190714T155300Z"
//      },
//      "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

refundId := CkJsonObject__stringOf(jResp,'refundId');
chargeId := CkJsonObject__stringOf(jResp,'chargeId');
refundAmountAmount := CkJsonObject__stringOf(jResp,'refundAmount.amount');
refundAmountCurrencyCode := CkJsonObject__stringOf(jResp,'refundAmount.currencyCode');
softDescriptor := CkJsonObject__stringOf(jResp,'softDescriptor');
creationTimestamp := CkJsonObject__stringOf(jResp,'creationTimestamp');
statusDetailsState := CkJsonObject__stringOf(jResp,'statusDetails.state');
statusDetailsReasonCode := CkJsonObject__stringOf(jResp,'statusDetails.reasonCode');
statusDetailsReasonDescription := CkJsonObject__stringOf(jResp,'statusDetails.reasonDescription');
statusDetailsLastUpdatedTimestamp := CkJsonObject__stringOf(jResp,'statusDetails.lastUpdatedTimestamp');
releaseEnvironment := CkJsonObject__stringOf(jResp,'releaseEnvironment');

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

end;