Brought creation of a session inside the tumbling state class

Breeze/src/Breeze.TumbleBit.Client/Controllers/TumbleBitController.cs

@@ -63,7 +63,7 @@ namespace Breeze.TumbleBit.Controllers
 
             try
             {
-                await this.tumbleBitManager.TumbleAsync(request.DestinationWalletName);
+                await this.tumbleBitManager.TumbleAsync(request.OriginWalletName, request.DestinationWalletName);
                 return this.Ok();
             }
             catch (Exception e)

Breeze/src/Breeze.TumbleBit.Client/ITumbleBitManager.cs

@@ -17,7 +17,7 @@ namespace Breeze.TumbleBit.Client
         /// <returns></returns>
         Task<ClassicTumblerParameters> ConnectToTumblerAsync(Uri serverAddress);
 
-        Task TumbleAsync(string destinationWalletName);
+        Task TumbleAsync(string originWalletName, string destinationWalletName);
 
         /// <summary>
         /// Processes a block received from the network.

Breeze/src/Breeze.TumbleBit.Client/Models/RequestModels.cs

@@ -28,7 +28,10 @@ namespace Breeze.TumbleBit.Models
 
     public class TumbleRequest
     {
-        [Required(ErrorMessage = "A wallet name is required.")]
+        [Required(ErrorMessage = "The name of the origin wallet is required.")]
+        public string OriginWalletName { get; set; }
+
+        [Required(ErrorMessage = "The name of the destination wallet is required.")]
         public string DestinationWalletName { get; set; }
     }
 }

Breeze/src/Breeze.TumbleBit.Client/TumbleBitManager.cs

@@ -23,13 +23,11 @@ namespace Breeze.TumbleBit.Client
         private readonly Network network;
         private TumblingState tumblingState;
         private IDisposable blockReceiver;
-        int lastCycleStarted;
      
         private ClassicTumblerParameters TumblerParameters { get; set; }
 
         public TumbleBitManager(ILoggerFactory loggerFactory, IWalletManager walletManager, ConcurrentChain chain, Network network, Signals signals)
         {
-            this.lastCycleStarted = 0;
             this.walletManager = walletManager;
             this.chain = chain;
             this.signals = signals;
@@ -64,7 +62,7 @@ namespace Breeze.TumbleBit.Client
         }
 
         /// <inheritdoc />
-        public Task TumbleAsync(string destinationWalletName)
+        public Task TumbleAsync(string originWalletName, string destinationWalletName)
         {
             // make sure the tumbler service is initialized
             if (this.TumblerParameters == null || this.tumblerService == null)
@@ -81,11 +79,19 @@ namespace Breeze.TumbleBit.Client
             Wallet destinationWallet = this.walletManager.GetWallet(destinationWalletName);
             if (destinationWallet == null)
             {
-                throw new Exception($"Destination not found. Have you created a wallet with name {destinationWalletName}?");
+                throw new Exception($"Destination wallet not found. Have you created a wallet with name {destinationWalletName}?");
+            }
+
+            Wallet originWallet = this.walletManager.GetWallet(originWalletName);
+            if (originWallet == null)
+            {
+                throw new Exception($"Origin wallet not found. Have you created a wallet with name {originWalletName}?");
             }
 
             // update the state and save
             this.tumblingState.DestinationWalletName = destinationWalletName;
+            this.tumblingState.OriginWalletName = originWalletName;
+
             this.tumblingState.Save();
 
             // subscribe to receiving blocks
@@ -114,29 +120,12 @@ namespace Breeze.TumbleBit.Client
         /// <inheritdoc />
         public void ProcessBlock(int height, Block block)
         {            
-            // TODO start the state machine 
-            this.logger.LogDebug($"Receive block with height {height}");
+            this.logger.LogDebug($"Received block with height {height} during tumbling session.");
 
             // update the block height in the tumbling state
             this.tumblingState.LastBlockReceivedHeight = height;
             this.tumblingState.Save();
             
-            // get the next cycle to be started
-            var cycle = this.TumblerParameters.CycleGenerator.GetRegistratingCycle(height);
-
-            // check if we need to start a new session starting from the registration cycle
-            if (this.lastCycleStarted != cycle.Start)
-            {
-                this.lastCycleStarted = cycle.Start;
-                this.logger.LogDebug($"new registration cycle at {cycle.Start}");
-
-                if (this.tumblingState.Sessions.SingleOrDefault(s => s.StartCycle == cycle.Start) == null)
-                {
-                    this.tumblingState.CreateNewSession(cycle.Start);
-                    this.logger.LogDebug($"new session created at {cycle.Start}");
-                }
-            }
-
             // update the state of the tumbling session in this new block
             this.tumblingState.Update();
         }

Breeze/src/Breeze.TumbleBit.Client/TumblingState.cs

@@ -4,10 +4,12 @@ using System.IO;
 using System.Linq;
 using System.Runtime.InteropServices;
 using Microsoft.Extensions.Logging;
+using NBitcoin;
 using Newtonsoft.Json;
 using NTumbleBit.ClassicTumbler;
 using NTumbleBit.PuzzlePromise;
 using NTumbleBit.PuzzleSolver;
+using Stratis.Bitcoin.Wallet;
 
 namespace Breeze.TumbleBit.Client
 {
@@ -24,9 +26,13 @@ namespace Breeze.TumbleBit.Client
         [JsonProperty("lastBlockReceivedHeight")]
         public int LastBlockReceivedHeight { get; set; }
 
+        [JsonProperty("originWalletName")]
+        public string OriginWalletName { get; set; }
+
         [JsonProperty("destinationWalletName")]
         public string DestinationWalletName { get; set; }
 
+        [JsonProperty("sessions")]
         public IList<Session> Sessions { get; set; }
         
         public TumblingState()
@@ -56,9 +62,22 @@ namespace Breeze.TumbleBit.Client
         /// <inheritdoc />
         public void Update()
         {
+            // get the next cycle to be started
+            var cycle = this.TumblerParameters.CycleGenerator.GetRegistratingCycle(this.LastBlockReceivedHeight);
+            var lastCycleStarted = this.Sessions.Max(s => s.StartCycle);
+
+            // check if we need to start a new session starting from the registration cycle
+            // TODO remove the limitation to have only 1 session
+            if (lastCycleStarted != cycle.Start && this.Sessions.Count == 0)
+            {                
+                if (this.Sessions.SingleOrDefault(s => s.StartCycle == cycle.Start) == null)
+                {
+                    this.CreateNewSession(cycle.Start);
+                }
+            }
+            
             // get a list of cycles we expect to have at this height
             var cycles = this.TumblerParameters.CycleGenerator.GetCycles(this.LastBlockReceivedHeight);
-
             var existingSessions = cycles.SelectMany(c => this.Sessions.Where(s => s.StartCycle == c.Start)).ToList();
             foreach (var existingSession in existingSessions)
             {
@@ -152,10 +171,13 @@ namespace Breeze.TumbleBit.Client
 
         public SolverClientSession.State SolverClientState { get; set; }
 
+        [JsonIgnore]
         public ClientChannelNegotiation ClientChannelNegotiation { get; set; }
 
+        [JsonIgnore]
         public SolverClientSession SolverClientSession { get; set; }
 
+        [JsonIgnore]
         public PromiseClientSession PromiseClientSession { get; set; }
 
         public void Update()