.NET POS Integration via PayClient

Payworks.PayClient.Bridge.dll (Protocol and Models)
Payworks.PayClient.Core.dll (Client and Communication)

NLog (https://www.nuget.org/packages/NLog/, see NLog.dll)
Json.NET (https://www.nuget.org/packages/Newtonsoft.Json/, see Newtonsoft.Json.dll)
WebSocketSharp (http://www.nuget.org/packages/WebSocketSharp, see websocket-sharp.dll)

PosClient = new PosClient(PAY_SERVER_ADDRESS, PAY_SERVER_PORT);

PosClient.ConnectAndLogin(MERCHANT_IDENTIFIER, MERCHANT_SECRET, Environment.TEST,
    (devices, error) =>
    {
        //check for error
        //use devices for interaction
        Device = devices[0];
    });

PosClient.Disconnect(
    (error) =>
    {
        //check for error
        //this should normally always succeed
    });

var transactionParameters = new TransactionParameters.Builder()
    .Charge(10.00m, Currency.EUR)
    .Subject("Box of chocolates")
    .CustomIdentifier("yourReferenceForTheTransaction")
    .Build();

The
TransactionStatusUpdated
callback provides you with status information throughout the transaction that you need to show to the merchant.
The
TransactionActionRequired
callback informs you that an action, like customer signature, is required for the transaction to continue.
The
TransactionCompleted
callback lets you know that the transaction is finished.

var transactionProcessParameters = new TransactionProcessParameters.Builder().Build();

InteractiveProcess = PosClient.GetTransactionModule().StartTransaction(Device, transactionParameters, transactionProcessParameters,
    (transaction, transactionProcessDetails, abortable) =>
    {
        // transaction update information

        // abortable indicates if the transaction can be aborted in the current state

        // transactionProcessDetails.Information array indicates human-readable the state information:
        // always show those two status lines in your merchant-facing UI

        // transactionProcessDetails.Information[0]
        // transactionProcessDetails.Information[1]
    },
    (actionType) =>
    {
        // check for action type
        if (actionType == Transactions.Actions.ActionType.SIGNATURE)
        {
            // submit digital signature.
            // signature field takes a byte array (byte[])
            InteractiveProcess.SubmitSignature(signature, (error) =>
            {
                // check for error
            });

            // or collect signature on the receipt after transaction
            InteractiveProcess.SubmitSignatureOnReceipt((error) =>
            {
                // check for error
            });
        }
    },
    (transaction, transactionProcessDetails, error) =>
    {    
        // check for error
        if (error != null)
        {
            // error indicates that there was a error with the transaction processing
            // check error.Type and error.Message for more information
         }
         else
          {
              // Inspect the transaction.Status to get the overall result / transaction completed
              if (transaction.Status == TransactionStatus.APPROVED) // DECLINED / ABORTED
              {
                   Console.WriteLine("APPROVED: " + transaction.Identifier);

                   // Save the Transaction.Identifier for later REFUNDs
                   // transaction.Identifier

                   // Provide a printed receipt to the merchant and shopper
                   // transaction.MerchantReceipt
                   // transaction.CustomerReceipt
              }
          }
    });

InteractiveProcess.Abort(
    (status, error) =>
    {
        //check for error and status
    });