Merge pull request #111 from bokobza/master

Better assessment for the wallet tip in the sync manager

Breeze/src/Breeze.Wallet/LightWalletSyncManager.cs

@@ -21,7 +21,7 @@ namespace Breeze.Wallet
         private readonly ILogger logger;
         private readonly Signals signals;
 
-        protected ChainedBlock walletTip;
+        private ChainedBlock walletTip;
 
         public LightWalletSyncManager(ILoggerFactory loggerFactory, IWalletManager walletManager, ConcurrentChain chain, Network network,
             BlockNotification blockNotification, Signals signals)
@@ -44,6 +44,12 @@ namespace Breeze.Wallet
             // get the chain headers. This needs to be up-to-date before we really do anything
             await this.WaitForChainDownloadAsync();
 
+            // if there is no wallet created yet, the wallet tip is the chain tip.
+            if (!this.walletManager.Wallets.Any())
+            {
+                this.walletTip = this.chain.Tip;
+            }            
+
             // subscribe to receiving blocks and transactions
             BlockSubscriber sub = new BlockSubscriber(this.signals.Blocks, new BlockObserver(this));
             sub.Subscribe();