Add Wallet settings menu, do not rebase keypaths when create the PSBT

BTCPayServer/Validation/HDFingerPrintValidator.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+using System.ComponentModel.DataAnnotations;
+using System.Linq;
+using System.Threading.Tasks;
+using NBitcoin;
+using NBitcoin.DataEncoders;
+
+namespace BTCPayServer.Validation
+{
+    public class HDFingerPrintValidator : ValidationAttribute
+    {
+        protected override ValidationResult IsValid(object value, ValidationContext validationContext)
+        {
+            var str = value as string;
+            if (string.IsNullOrWhiteSpace(str))
+            {
+                return ValidationResult.Success;
+            }
+            
+            try
+            {
+                new HDFingerprint(Encoders.Hex.DecodeData(str));
+                return ValidationResult.Success;
+            }
+            catch
+            {
+                return new ValidationResult("Invalid fingerprint");
+            }
+        }
+    }
+}