feat(payment): implement multi-gateway support and enhance payment processing

- Added support for multiple payment gateways, including ZarinPal and TwentyCard, through a new IPaymentGatewayResolver.
- Updated PaymentRequest DTO to include payer name and invoice number for better transaction tracking.
- Enhanced PackageService to dynamically determine payment amounts based on the selected gateway.
- Updated appsettings to include configuration for TwentyCard payment options.
- Bumped Protobuf project version to reflect the addition of new features and changes.

src/CMSMicroservice.WebApi/Services/PackageService.cs

@@ -32,7 +32,7 @@ public class PackageService : PackageContract.PackageContractBase
     private readonly ISender _sender;
     private readonly IApplicationDbContext _context;
     private readonly ICurrentUserService _currentUserService;
-    private readonly IPaymentGatewayService _paymentGateway;
+    private readonly IPaymentGatewayResolver _paymentGatewayResolver;
     private readonly IConfiguration _configuration;
     private readonly IUserPaymentLock _paymentLock;
 
@@ -41,7 +41,7 @@ public class PackageService : PackageContract.PackageContractBase
         ISender sender,
         IApplicationDbContext context,
         ICurrentUserService currentUserService,
-        IPaymentGatewayService paymentGateway,
+        IPaymentGatewayResolver paymentGatewayResolver,
         IConfiguration configuration,
         IUserPaymentLock paymentLock)
     {
@@ -49,7 +49,7 @@ public class PackageService : PackageContract.PackageContractBase
         _sender = sender;
         _context = context;
         _currentUserService = currentUserService;
-        _paymentGateway = paymentGateway;
+        _paymentGatewayResolver = paymentGatewayResolver;
         _configuration = configuration;
         _paymentLock = paymentLock;
     }
@@ -171,19 +171,38 @@ public class PackageService : PackageContract.PackageContractBase
         
         if (package == null)
             throw new RpcException(new Status(StatusCode.NotFound, "پکیج مورد نظر یافت نشد"));
-        
-        // Create transaction
+
+        var gatewayProvider = NormalizeGatewayProvider(request.GatewayProvider);
+        var isTwentyCard = gatewayProvider == "20card";
+
+        long gatewayAmount = package.Price;
+        if (isTwentyCard)
+        {
+            var packageKey = $"TwentyCard:Packages:{package.Id}";
+            gatewayAmount = _configuration.GetValue<long?>($"{packageKey}:GatewayAmountToman") ?? 0;
+            var walletCredit = _configuration.GetValue<long?>($"{packageKey}:WalletCreditToman") ?? 0;
+            if (gatewayAmount <= 0 || walletCredit <= 0)
+            {
+                throw new RpcException(new Status(
+                    StatusCode.FailedPrecondition,
+                    "پرداخت ۲۰کارت برای این پکیج پیکربندی نشده است"));
+            }
+        }
+
+        // Create transaction — 20card: Amount = gateway charge; zarinpal: Package.Price
         var transaction = new CMSMicroservice.Domain.Entities.Transaction
         {
-            Amount = package.Price,
-            Description = $"خرید پکیج {package.Title}",
+            Amount = gatewayAmount,
+            Description = isTwentyCard
+                ? $"خرید پکیج {package.Title} (۲۰کارت)"
+                : $"خرید پکیج {package.Title}",
             PaymentStatus = Domain.Enums.PaymentStatus.Pending,
             Type = Domain.Enums.TransactionType.Buy
         };
         _context.Transactions.Add(transaction);
         await _context.SaveChangesAsync(cancellationToken);
         
-        // Create purchase record
+        // Create purchase record — UPP.Amount always Package.Price (catalog)
         var purchaseMethod = request.PurchaseMethod == PurchaseMethodEnum.PurchaseMethodGateway 
             ? Domain.Enums.PackagePurchaseMethod.DirectPurchase 
             : Domain.Enums.PackagePurchaseMethod.DayaLoan;
@@ -204,18 +223,23 @@ public class PackageService : PackageContract.PackageContractBase
         var user = await _context.Users
             .AsNoTracking()
             .Where(u => u.Id == userId)
-            .Select(u => new { u.Mobile })
+            .Select(u => new { u.Mobile, u.FirstName, u.LastName })
             .FirstOrDefaultAsync(cancellationToken);
         
         // Callback URL از config — نه از ورودی کاربر (امنیت)
         var frontOfficeBaseUrl = _configuration["FrontOfficeBaseUrl"] ?? "https://localhost:5268";
         var callbackUrl = $"{frontOfficeBaseUrl}/profile/payment-callback?orderId={purchase.Id}";
+
+        var paymentGateway = _paymentGatewayResolver.Get(gatewayProvider);
+        var payerName = $"{user?.FirstName} {user?.LastName}".Trim();
         
-        var paymentResult = await _paymentGateway.InitiatePaymentAsync(new PaymentRequest
+        var paymentResult = await paymentGateway.InitiatePaymentAsync(new PaymentRequest
         {
-            Amount = package.Price,
+            Amount = gatewayAmount,
             UserId = userId,
             Mobile = user?.Mobile ?? string.Empty,
+            Name = payerName,
+            Invoice = purchase.Id.ToString(),
             Description = $"خرید پکیج {package.Title}",
             CallbackUrl = callbackUrl
         }, cancellationToken);
@@ -235,12 +259,14 @@ public class PackageService : PackageContract.PackageContractBase
         // Save RefId
         transaction.RefId = paymentResult.RefId;
 
-        // ثبت PaymentTransaction
+        // ثبت PaymentTransaction — Amount = gateway amount
         var paymentTx = new PaymentTransaction
         {
-            GatewayProvider = _configuration["PaymentProvider"] ?? "zarinpal",
-            MerchantId = _configuration["ZarinPal:MerchantId"] ?? "",
-            Amount = package.Price,
+            GatewayProvider = gatewayProvider,
+            MerchantId = isTwentyCard
+                ? (_configuration["TwentyCard:TerminalId"] ?? "")
+                : (_configuration["ZarinPal:MerchantId"] ?? ""),
+            Amount = gatewayAmount,
             CallbackUrl = callbackUrl,
             Description = $"خرید پکیج {package.Title}",
             Mobile = user?.Mobile,
@@ -264,6 +290,14 @@ public class PackageService : PackageContract.PackageContractBase
             Authority = paymentResult.RefId ?? string.Empty
         };
     }
+
+    private static string NormalizeGatewayProvider(string? provider)
+    {
+        if (string.IsNullOrWhiteSpace(provider))
+            return "zarinpal";
+        var key = provider.Trim().ToLowerInvariant();
+        return key is "20card" or "twentycard" ? "20card" : "zarinpal";
+    }
     
     public override async Task<CustomerVerifyPackagePurchaseResponse> CustomerVerifyPackagePurchase(
         CustomerVerifyPackagePurchaseRequest request,