Add feedback to user for polls repo rebuild and get tip via API

src/Stratis.Bitcoin.Features.PoA/Voting/PollsRepository.cs

@@ -69,7 +69,7 @@ public void Initialize()
                         var uniquePolls = new HashSet<Poll>(polls);
                         if (uniquePolls.Count != polls.Count)
                         {
-                            this.logger.Warn("The polls repo contains {0} duplicate polls. Will rebuild it.", polls.Count - uniquePolls.Count);
+                            this.logger.Warn("The polls repository contains {0} duplicate polls, it will be rebuilt.", polls.Count - uniquePolls.Count);
 
                             this.ResetLocked(transaction);
                             transaction.Commit();
@@ -79,7 +79,7 @@ public void Initialize()
                         Row<byte[], byte[]> rowTip = transaction.Select<byte[], byte[]>(DataTable, RepositoryTipKey);
                         if (!rowTip.Exists)
                         {
-                            this.logger.Info("The polls repository tip is unknown. Will re-build the repo.");
+                            this.logger.Info("The polls repository tip is unknown, it will be rebuilt.");
                             this.ResetLocked(transaction);
                             transaction.Commit();
                             return;
@@ -92,7 +92,7 @@ public void Initialize()
                             return;
                         }
 
-                        this.logger.Info("The polls repository tip {0} was not found in the consensus chain. Determining fork.", this.CurrentTip);
+                        this.logger.Info("The polls repository tip {0} was not found in the consensus chain, determining fork.", this.CurrentTip);
 
                         // == Find fork.
                         // The polls repository tip could not be found in the consenus chain.
@@ -113,15 +113,15 @@ public void Initialize()
 
                         if (maxGoodHeight == -1)
                         {
-                            this.logger.Info("No common blocks found. Will rebuild the repo from scratch.");
+                            this.logger.Info("No common blocks found; the repo will be rebuil from scratch.");
                             this.ResetLocked(transaction);
                             transaction.Commit();
                             return;
                         }
 
                         this.CurrentTip = new HashHeightPair(this.chainIndexer.GetHeader(maxGoodHeight));
 
-                        this.logger.Info("Common block found at height {0}. Will re-build the repo from there.", this.CurrentTip.Height);
+                        this.logger.Info("Common block found at height {0}; the repo will be rebuilt from there.", this.CurrentTip.Height);
 
                         // Trim polls to tip.
                         HashSet<Poll> pollsToDelete = new HashSet<Poll>();

src/Stratis.Bitcoin.Features.PoA/Voting/VotingController.cs

@@ -40,6 +40,29 @@ public VotingController(
             this.logger = LogManager.GetCurrentClassLogger();
         }
 
+        /// <summary>
+        /// Retrieves the tip of the polls repository.
+        /// </summary>
+        /// <returns>The poll repository tip.</returns>
+        /// <response code="200">The request succeeded.</response>
+        /// <response code="400">Unexpected exception occurred</response>
+        [Route("polls/tip")]
+        [HttpGet]
+        [ProducesResponseType((int)HttpStatusCode.OK)]
+        [ProducesResponseType((int)HttpStatusCode.BadRequest)]
+        public IActionResult GetPollsRepositoryTip()
+        {
+            try
+            {
+                return this.Json(this.votingManager.GetPollsRepositoryTip());
+            }
+            catch (Exception e)
+            {
+                this.logger.Error("Exception occurred: {0}", e.ToString());
+                return ErrorHelpers.BuildErrorResponse(HttpStatusCode.BadRequest, e.Message, e.ToString());
+            }
+        }
+
         /// <summary>
         /// Retrieves a list of pending or "active" polls.
         /// </summary>

src/Stratis.Bitcoin.Features.PoA/Voting/VotingManager.cs

@@ -64,8 +64,14 @@ public sealed class VotingManager : IDisposable
 
         internal bool isInitialized;
 
-        public VotingManager(IFederationManager federationManager, IPollResultExecutor pollResultExecutor, INodeStats nodeStats,
-            DataFolder dataFolder, DBreezeSerializer dBreezeSerializer, ISignals signals, Network network,
+        public VotingManager(
+            IFederationManager federationManager,
+            IPollResultExecutor pollResultExecutor,
+            INodeStats nodeStats,
+            DataFolder dataFolder,
+            DBreezeSerializer dBreezeSerializer,
+            ISignals signals,
+            Network network,
             IBlockRepository blockRepository = null,
             ChainIndexer chainIndexer = null,
             INodeLifetime nodeLifetime = null)
@@ -826,6 +832,7 @@ internal bool Synchronize(ChainedHeader newTip)
                             if (header.Height % 10000 == 0)
                             {
                                 this.logger.Info($"Synchronizing voting data at height {header.Height}.");
+                                this.signals.Publish(new FullNodeEvent() { Message = $"Synchronizing voting data at height {header.Height}.", State = FullNodeState.Initializing.ToString() });
                             }
                         }