Merged the Wallet and WalletFIle objects, no need to have both.

Added a WalletHierarchy class to contain accounts, addresses and transactions.

Breeze/src/Breeze.Wallet/Wallet.cs

 using System;
+using Breeze.Wallet.JsonConverters;
 using NBitcoin;
+using Newtonsoft.Json;
 
 namespace Breeze.Wallet
 {
@@ -8,29 +10,44 @@ namespace Breeze.Wallet
     /// </summary>
     public class Wallet
     {
+
+        /// <summary>
+        /// The seed for this wallet, password encrypted.
+        /// </summary>
+        [JsonProperty(PropertyName = "encryptedSeed")]
+        public string EncryptedSeed { get; set; }
+
         /// <summary>
         /// The chain code. 
         /// </summary>
+        [JsonProperty(PropertyName = "chainCode")]
+        [JsonConverter(typeof(ByteArrayConverter))]
         public byte[] ChainCode { get; set; }
 
         /// <summary>
         /// The network this wallet is for.
         /// </summary>
+        [JsonProperty(PropertyName = "network")]
+        [JsonConverter(typeof(NetworkConverter))]
         public Network Network { get; set; }
 
         /// <summary>
         /// The time this wallet was created.
         /// </summary>
+        [JsonProperty(PropertyName = "creationTime")]
+        [JsonConverter(typeof(DateTimeOffsetConverter))]
         public DateTimeOffset CreationTime { get; set; }
 
         /// <summary>
         /// The location of the wallet file on the local system.
         /// </summary>
+        [JsonIgnore]
         public string WalletFilePath { get; set; }
 
         /// <summary>
-        /// The key used to generate keys.
+        /// The hierarchy of the wallet's accounts and addresses.
         /// </summary>
-        public ExtKey ExtendedKey { get; set; }
+        [JsonProperty(PropertyName = "hierarchy")]
+        public WalletHierarchy Hierarchy { get; set; }
     }
 }
\ No newline at end of file

Breeze/src/Breeze.Wallet/WalletFeature.cs

@@ -42,7 +42,7 @@ namespace Breeze.Wallet
 				.FeatureServices(services =>
 				{
 					services.AddTransient<IWalletWrapper, WalletWrapper>();
-					services.AddTransient<ITrackerWrapper, TrackerWrapper>();
+					services.AddSingleton<ITrackerWrapper, TrackerWrapper>();
 				    services.AddSingleton<IWalletManager, WalletManager>();
 		            services.AddSingleton<WalletController>();
 				});

Breeze/src/Breeze.Wallet/WalletFile.cs

-using System;
-using NBitcoin;
-using Newtonsoft.Json;
-using Breeze.Wallet.JsonConverters;
-
-namespace Breeze.Wallet
-{
-    /// <summary>
-    /// An object representing a wallet on a local file system.
-    /// </summary>
-    public class WalletFile
-    {
-        /// <summary>
-        /// The seed for this wallet, password encrypted.
-        /// </summary>
-        [JsonProperty(PropertyName = "encryptedSeed")]
-        public string EncryptedSeed { get; set; }
-
-        /// <summary>
-        /// The chain code. 
-        /// </summary>
-        [JsonProperty(PropertyName = "chainCode")]
-        [JsonConverter(typeof(ByteArrayConverter))]
-        public byte[] ChainCode { get; set; }
-
-        /// <summary>
-        /// The network this wallet is for.
-        /// </summary>
-        [JsonProperty(PropertyName = "network")]
-        [JsonConverter(typeof(NetworkConverter))]
-        public Network Network { get; set; }
-
-        /// <summary>
-        /// The time this wallet was created.
-        /// </summary>
-        [JsonProperty(PropertyName = "creationTime")]
-        [JsonConverter(typeof(DateTimeOffsetConverter))]
-        public DateTimeOffset CreationTime { get; set; }
-    }
-}

Breeze/src/Breeze.Wallet/WalletHierarchy.cs

+using System;
+using System.Collections.Generic;
+using Breeze.Wallet.JsonConverters;
+using NBitcoin;
+using Newtonsoft.Json;
+
+namespace Breeze.Wallet
+{
+    /// <summary>
+    /// Represents the root of the user's wallet's addresses and transactions.
+    /// </summary>
+    public class WalletHierarchy
+    {
+        /// <summary>
+        /// The type of coin, Bitcoin or Stratis.
+        /// </summary>
+        [JsonProperty(PropertyName = "coinType")]
+        public CoinType CoinType { get; set; }
+
+        /// <summary>
+        /// The accounts used in the wallet.
+        /// </summary>
+        [JsonProperty(PropertyName = "accounts")]
+        public IEnumerable<HdAccount> Accounts { get; set; }
+    }
+
+    /// <summary>
+    /// The type of coin, as specified in BIP44.
+    /// </summary>
+    public enum CoinType
+    {
+        Bitcoin = 0,
+        Stratis = 105
+    }
+
+    /// <summary>
+    /// An Hd account's details.
+    /// </summary>
+    public class HdAccount
+    {
+        /// <summary>
+        /// The index of the account.
+        /// </summary>
+        /// <remarks>
+        /// According to BIP44, an account at index (i) can only be created when the account
+        /// at index (i - 1) contains transactions.
+        /// </remarks>
+        [JsonProperty(PropertyName = "index")]
+        public int Index { get; set; }
+
+        /// <summary>
+        /// The list of external addresses, typically used for receiving money.
+        /// </summary>
+        [JsonProperty(PropertyName = "externalAddresses")]
+        public IEnumerable<HdAddress> ExternalAddresses { get; set; }
+
+        /// <summary>
+        /// The list of internal addresses, typically used to receive change.
+        /// </summary>
+        [JsonProperty(PropertyName = "internalAddresses")]
+        public IEnumerable<HdAddress> InternalAddresses { get; set; }
+    }
+
+    /// <summary>
+    /// An Hd address.
+    /// </summary>
+    public class HdAddress
+    {
+        /// <summary>
+        /// Gets or sets the creation time.
+        /// </summary>
+        [JsonProperty(PropertyName = "creationTime")]
+        [JsonConverter(typeof(DateTimeOffsetConverter))]
+        public DateTimeOffset CreationTime { get; set; }
+
+        /// <summary>
+        /// The script pub key for this address.
+        /// </summary>
+        [JsonProperty(PropertyName = "scriptPubKey")]
+        public Script ScriptPubKey { get; set; }
+
+        /// <summary>
+        /// The Base58 representation of this address.
+        /// </summary>
+        [JsonProperty(PropertyName = "address")]
+        public BitcoinAddress Address { get; set; }
+
+        /// <summary>
+        /// A path to the address as defined in BIP44.
+        /// </summary>
+        [JsonProperty(PropertyName = "hdPath")]
+        public string HdPath { get; set; }
+
+        /// <summary>
+        /// A list detailing which blocks have been scanned for this address.
+        /// </summary>
+        [JsonIgnore]
+        public SortedList<int, int> BlocksScanned { get; set; }
+
+        /// <summary>
+        /// A list of transactions involving this address.
+        /// </summary>
+        [JsonProperty(PropertyName = "transactions")]
+        public IEnumerable<TransactionData> Transactions { get; set; }
+    }
+
+    /// <summary>
+    /// An object containing transaction data.
+    /// </summary>
+    public class TransactionData
+    {
+        /// <summary>
+        /// Transaction id.
+        /// </summary>
+        [JsonProperty(PropertyName = "id")]
+        public string Id { get; set; }
+
+        /// <summary>
+        /// The transaction amount.
+        /// </summary>
+        [JsonProperty(PropertyName = "amount")]
+        public Money Amount { get; set; }
+
+        /// <summary>
+        /// The height of the block including this transaction.
+        /// </summary>
+        [JsonProperty(PropertyName = "blockHeight")]
+        public int BlockHeight { get; set; }
+
+        /// <summary>
+        /// Whether this transaction has been confirmed or not.
+        /// </summary>
+        [JsonProperty(PropertyName = "confirmed")]
+        public bool Confirmed { get; set; }
+
+        /// <summary>
+        /// Gets or sets the creation time.
+        /// </summary>
+        [JsonProperty(PropertyName = "creationTime")]
+        [JsonConverter(typeof(DateTimeOffsetConverter))]
+        public DateTimeOffset CreationTime { get; set; }
+    }
+}

Breeze/src/Breeze.Wallet/WalletManager.cs

@@ -19,8 +19,7 @@ namespace Breeze.Wallet
             ExtKey extendedKey = mnemonic.DeriveExtKey(passphrase);
 
             // create a wallet file 
-            this.GenerateWalletFile(password, walletFilePath, network, extendedKey);
-            
+            Wallet wallet = this.GenerateWalletFile(password, walletFilePath, network, extendedKey);            
             return mnemonic;
         }
 
@@ -31,21 +30,7 @@ namespace Breeze.Wallet
                 throw new FileNotFoundException($"No wallet file found at {walletFilePath}");
 
             // load the file from the local system
-            WalletFile walletFile = JsonConvert.DeserializeObject<WalletFile>(File.ReadAllText(walletFilePath));
-
-            // decrypt the private key and use it to regenerate the seed
-            var privateKey = Key.Parse(walletFile.EncryptedSeed, password, walletFile.Network);
-            var seedExtKey = new ExtKey(privateKey, walletFile.ChainCode);
-
-            Wallet wallet = new Wallet
-            {
-                ChainCode = walletFile.ChainCode,
-                CreationTime = walletFile.CreationTime,
-                Network = walletFile.Network,
-                WalletFilePath = walletFilePath,
-                ExtendedKey = seedExtKey
-            };
-            
+            Wallet wallet = JsonConvert.DeserializeObject<Wallet>(File.ReadAllText(walletFilePath));            
             return wallet;
         }
 
@@ -56,17 +41,7 @@ namespace Breeze.Wallet
             ExtKey extendedKey = mnemonic.DeriveExtKey(passphrase);
 
             // create a wallet file 
-            WalletFile walletFile = this.GenerateWalletFile(password, walletFilePath, network, extendedKey, creationTime);
-            
-            Wallet wallet = new Wallet
-            {
-                ChainCode = walletFile.ChainCode,
-                CreationTime = walletFile.CreationTime,
-                Network = walletFile.Network,
-                WalletFilePath = walletFilePath,
-                ExtendedKey = extendedKey
-            };
-
+            Wallet wallet = this.GenerateWalletFile(password, walletFilePath, network, extendedKey, creationTime);           
             return wallet;
         }
         
@@ -92,12 +67,12 @@ namespace Breeze.Wallet
         /// <param name="creationTime">The time this wallet was created.</param>
         /// <returns></returns>
         /// <exception cref="System.NotSupportedException"></exception>
-        private WalletFile GenerateWalletFile(string password, string walletFilePath, Network network, ExtKey extendedKey, DateTimeOffset? creationTime = null)
+        private Wallet GenerateWalletFile(string password, string walletFilePath, Network network, ExtKey extendedKey, DateTimeOffset? creationTime = null)
         {
             if (File.Exists(walletFilePath))
                 throw new InvalidOperationException($"Wallet already exists at {walletFilePath}");
 
-            WalletFile walletFile = new WalletFile
+            Wallet walletFile = new Wallet
             {
                 EncryptedSeed = extendedKey.PrivateKey.GetEncryptedBitcoinSecret(password, network).ToWif(),
                 ChainCode = extendedKey.ChainCode,