(Delphi DLL) CardConnect Void

Demonstrates how to send a CardConnect void request.

The void service cancels a transaction that is in either "Authorized" or "Queued for Capture" status.. ...

See https://developer.cardconnect.com/cardconnect-api#void

Chilkat for Delphi Downloads Chilkat non-ActiveX DLL for Delphi Chilkat ActiveX DLL for Delphi * The examples here use the non-ActiveX DLL.

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: HCkHttp;
success: Boolean;
json: HCkJsonObject;
url: PWideChar;
responseStr: PWideChar;
jsonResp: HCkJsonObject;
authcode: PWideChar;
respproc: PWideChar;
amount: PWideChar;
resptext: PWideChar;
currency: PWideChar;
retref: PWideChar;
respstat: PWideChar;
respcode: PWideChar;
merchid: PWideChar;

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

http := CkHttp_Create();

CkHttp_putBasicAuth(http,True);
CkHttp_putLogin(http,'API_USERNAME');
CkHttp_putPassword(http,'API_PASSWORD');

// Build and send the following JSON:

// The "retref" is the value returned in the JSON response for the Authorization request.

// {
//     "retref":"112989260941",
//     "merchid":"MERCHANT_ID"
// }

json := CkJsonObject_Create();
CkJsonObject_UpdateString(json,'retref','112989260941');
CkJsonObject_UpdateString(json,'merchid','MERCHANT_ID');

url := 'https://<site>.cardconnect.com:<port>/cardconnect/rest/void';
responseStr := CkHttp__putText(http,url,CkJsonObject__emit(json),'utf-8','application/json',False,False);
if (CkHttp_getLastMethodSuccess(http) = False) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

// A response status of 200 indicates potential success.  The JSON response body
// must be examined to determine if it was truly successful or an error.
Memo1.Lines.Add('response status code = ' + IntToStr(CkHttp_getLastStatus(http)));

jsonResp := CkJsonObject_Create();
CkJsonObject_Load(jsonResp,responseStr);
CkJsonObject_putEmitCompact(jsonResp,False);

Memo1.Lines.Add('response JSON:');
Memo1.Lines.Add(CkJsonObject__emit(jsonResp));

// A successful response looks like this:

// {
//   "authcode": "REVERS",
//   "respproc": "FNOR",
//   "amount": "0.00",
//   "resptext": "Approval",
//   "currency": "USD",
//   "retref": "112989260941",
//   "respstat": "A",
//   "respcode": "00",
//   "merchid": "496160873888"
// }

// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

authcode := CkJsonObject__stringOf(jsonResp,'authcode');
respproc := CkJsonObject__stringOf(jsonResp,'respproc');
amount := CkJsonObject__stringOf(jsonResp,'amount');
resptext := CkJsonObject__stringOf(jsonResp,'resptext');
currency := CkJsonObject__stringOf(jsonResp,'currency');
retref := CkJsonObject__stringOf(jsonResp,'retref');
respstat := CkJsonObject__stringOf(jsonResp,'respstat');
respcode := CkJsonObject__stringOf(jsonResp,'respcode');
merchid := CkJsonObject__stringOf(jsonResp,'merchid');

CkHttp_Dispose(http);
CkJsonObject_Dispose(json);
CkJsonObject_Dispose(jsonResp);

end;