Adding a shutdown api method

Breeze/src/Breeze.Api/Controllers/NodeController.cs

 using System.ComponentModel.DataAnnotations;
+using Microsoft.AspNetCore.Hosting;
 using Microsoft.AspNetCore.Mvc;
 using NBitcoin;
+using Stratis.Bitcoin.Builder;
 using Stratis.Bitcoin.Notifications;
 
 namespace Breeze.Api.Controllers
@@ -8,11 +10,11 @@ namespace Breeze.Api.Controllers
 	[Route("api/[controller]")]
 	public class NodeController : Controller
 	{
-		private readonly BlockNotification blockNotification;
+	    private readonly IFullNode fullNode;
 
-		public NodeController(BlockNotification blockNotification)
+	    public NodeController(IFullNode fullNode)
 	    {
-			this.blockNotification = blockNotification;
+	        this.fullNode = fullNode;
 	    }
 
         /// <summary>
@@ -27,27 +29,18 @@ namespace Breeze.Api.Controllers
 		}
 
 	    /// <summary>
-        /// Starts sending block to the wallet for synchronisation.
-        /// This is for demo and testing use only.
+	    /// Trigger a shoutdown of the current running node.
 	    /// </summary>
-        /// <param name="model">The hash of the block from which to start syncing.</param>
 	    /// <returns></returns>
 	    [HttpPost]
-		[Route("sync")]
-		public IActionResult Sync([FromBody] HashModel model)
+	    [Route("shutdown")]
+	    public IActionResult Shutdown()
 	    {
-			if (!ModelState.IsValid)
-			{
-				return this.BadRequest();
-			}
-			this.blockNotification.SyncFrom(uint256.Parse(model.Hash));
+            // start the node shutdown process
+            this.fullNode.Stop();
+
 	        return this.Ok();
 	    }
     }
 
-	public class HashModel
-	{
-		[Required(AllowEmptyStrings = false)]
-		public string Hash { get; set; }
-	}
 }
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