🐛 Fix services unimplmented

DysonNetwork.Wallet/Payment/PaymentService.cs

@@ -743,15 +743,12 @@ public class PaymentService(
         await db.SaveChangesAsync();
     }
 
-    public async Task<SnWalletFund> GetWalletFundAsync(Guid fundId)
+    public async Task<SnWalletFund?> GetWalletFundAsync(Guid fundId)
     {
         var fund = await db.WalletFunds
             .Include(f => f.Recipients)
             .FirstOrDefaultAsync(f => f.Id == fundId);
 
-        if (fund == null)
-            throw new InvalidOperationException("Fund not found");
-
         return fund;
     }
 

DysonNetwork.Wallet/Payment/PaymentServiceGrpc.cs

@@ -107,6 +107,6 @@ public class PaymentServiceGrpc(PaymentService paymentService)
     )
     {
         var walletFund = await paymentService.GetWalletFundAsync(Guid.Parse(request.FundId));
-        return walletFund.ToProtoValue();
+        return walletFund?.ToProtoValueWithRecipients() ?? new WalletFund();
     }
 }