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

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

...

procedure TForm1.Button1Click(Sender: TObject);
var
http: TChilkatHttp;
success: Integer;
json: TChilkatJsonObject;
url: WideString;
responseStr: WideString;
jsonResp: TChilkatJsonObject;
authcode: WideString;
respproc: WideString;
amount: WideString;
resptext: WideString;
currency: WideString;
retref: WideString;
respstat: WideString;
respcode: WideString;
merchid: WideString;

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

http := TChilkatHttp.Create(Self);

http.BasicAuth := 1;
http.Login := 'API_USERNAME';
http.Password := '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 := TChilkatJsonObject.Create(Self);
json.UpdateString('retref','112989260941');
json.UpdateString('merchid','MERCHANT_ID');

url := 'https://<site>.cardconnect.com:<port>/cardconnect/rest/void';
responseStr := http.PutText(url,json.Emit(),'utf-8','application/json',0,0);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    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(http.LastStatus));

jsonResp := TChilkatJsonObject.Create(Self);
jsonResp.Load(responseStr);
jsonResp.EmitCompact := 0;

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

// 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 := jsonResp.StringOf('authcode');
respproc := jsonResp.StringOf('respproc');
amount := jsonResp.StringOf('amount');
resptext := jsonResp.StringOf('resptext');
currency := jsonResp.StringOf('currency');
retref := jsonResp.StringOf('retref');
respstat := jsonResp.StringOf('respstat');
respcode := jsonResp.StringOf('respcode');
merchid := jsonResp.StringOf('merchid');
end;