/// <summary>
/// Makes a transaction when there exist a verified agreement between the client and the merchant.
/// In case of payment failure: Please use a minimum of 30 minutes delay between the first try and the second. If the
/// transaction still fails, please wait a couple of hours before the next try. After a total period of 8 hours, you should
/// stop trying to charge the customer.
/// Documentation: http://www.payexpim.com/technical-reference/pxagreement/autopay/
/// </summary>
/// <param name="request">The parameters to the AutoPay request</param>
public async Task <AutoPayResult> AutoPay(AutoPayRequest request)
{
// Validation
if (request == null)
{
throw new ArgumentNullException(nameof(request), "request is required");
}
// Build string for md5 including all fields except empty strings and description field
var hashInput = new StringBuilder();
hashInput.Append(Account.AccountNumber);
hashInput.Append(request.AgreementRef);
hashInput.Append(request.Amount.ToPayEx());
hashInput.Append(request.ProductNumber);
hashInput.Append(request.Description);
hashInput.Append(request.OrderID);
hashInput.Append(request.PurchaseOperation.ToPayEx());
hashInput.Append(request.CurrencyCode);
// Add encryption key at the end of string to be hashed
hashInput.Append(Account.EncryptionKey);
// Create a hash string from the parameters
string hash;
MD5Hash.Hash(hashInput.ToString(), out hash);
// Invoke Initialize method on external PayEx PxOrder web service
var payexAgreement = GetPxAgreementClient();
var xmlReturn = await payexAgreement.AutoPay3Async(
Account.AccountNumber,
request.AgreementRef ?? "",
request.Amount.ToPayEx(),
request.ProductNumber ?? "",
request.Description ?? "",
request.OrderID ?? "",
request.PurchaseOperation.ToPayEx(),
request.CurrencyCode ?? "",
hash);
// Parse the result
var result = ResultParser.ParseAutoPayResult(xmlReturn);
return(result);
}
