update nbx + prep bitcoin payment data ctor change

BTCPayServer/Extensions/MoneyExtensions.cs

@@ -0,0 +1,30 @@
+using System;
+using System.Linq;
+using NBitcoin;
+
+namespace BTCPayServer
+{
+    public static class MoneyExtensions
+    {
+        public static Money GetValue(this IMoney m, BTCPayNetwork network = null)
+        {
+            switch (m)
+            {
+                case Money money:
+                    return money;
+                case MoneyBag mb:
+                    return mb.Select(money => money.GetValue(network)).Sum();
+//                case AssetMoney assetMoney:
+//                    if (network is ElementsBTCPayNetwork elementsBTCPayNetwork)
+//                    {
+//                        return elementsBTCPayNetwork.AssetId == assetMoney.AssetId
+//                            ? new Money(assetMoney.Quantity)
+//                            : Money.Zero;
+//                    }
+//                    throw new NotSupportedException("IMoney type not supported");
+                default:
+                    throw new NotSupportedException("IMoney type not supported");
+            }
+        }
+    }
+}