Merge pull request #114 from bokobza/master

Chain + loglevel

Breeze/src/Breeze.Daemon/Program.cs

@@ -35,11 +35,7 @@ namespace Breeze.Daemon
             Logs.Configure(Logs.GetLoggerFactory(args));
 
             // get the api uri 
-            var apiUri = args.SingleOrDefault(arg => arg.StartsWith("apiuri"));
-            if (!string.IsNullOrEmpty(apiUri))
-            {
-                apiUri = apiUri.Replace("apiuri=", string.Empty);
-            }
+            var apiUri = args.GetValueOf("apiuri");
 
             if (args.Contains("stratis"))
             {

Breeze/src/Breeze.Daemon/Properties/launchSettings.json

@@ -6,7 +6,7 @@
     },
     "Breeze.Daemon TestNet": {
       "commandName": "Project",
-      "commandLineArgs": "-testnet -tumbler-uri=http://localhost:5050 light -debug"
+      "commandLineArgs": "-testnet -tumbler-uri=http://localhost:5050 light -debug=all -loglevel=debug"
     },
     "StratisTest": {
       "commandName": "Project",

Breeze/src/Breeze.Wallet/LightWalletSyncManager.cs

@@ -37,15 +37,32 @@ namespace Breeze.Wallet
         /// <inheritdoc />
         public Task Initialize()
         {            
-            this.walletTip = this.chain.GetBlock(this.walletManager.WalletTipHash);
-            if (this.walletTip == null)
-                throw new WalletException("the wallet tip was not found in the main chain");
-            
             // if there is no wallet created yet, the wallet tip is the chain tip.
             if (!this.walletManager.Wallets.Any())
             {
                 this.walletTip = this.chain.Tip;
             }
+            else
+            {
+                this.walletTip = this.chain.GetBlock(this.walletManager.WalletTipHash);
+                if (this.walletTip == null)
+                {
+                    // the wallet tip was not found in the main chain.
+                    // this can happen if the node crashes unexpectedly.
+                    // to recover we need to find the first common fork 
+                    // with the best chain, as the wallet does not have a  
+                    // list of chain headers we use a BlockLocator and persist 
+                    // that in the wallet. the block locator will help finding 
+                    // a common fork and bringing the wallet back to a good 
+                    // state (behind the best chain)
+                    var locators = this.walletManager.Wallets.First().BlockLocator;
+                    BlockLocator blockLocator = new BlockLocator { Blocks = locators.ToList() };
+                    var fork = this.chain.FindFork(blockLocator);
+                    this.walletManager.RemoveBlocks(fork);
+                    this.walletManager.WalletTipHash = fork.HashBlock;
+                    this.walletTip = fork;
+                }
+            }
 
             // subscribe to receiving blocks and transactions
             BlockSubscriber sub = new BlockSubscriber(this.signals.Blocks, new BlockObserver(this));
@@ -129,7 +146,7 @@ namespace Breeze.Wallet
                     if (incomingBlock.Height > this.walletTip.Height)
                     {
                         // the wallet is falling behind we need to catch up
-                        this.logger.LogDebug($"block received with height: {inBestChain.Height} and hash: {block.Header.GetHash()} is too far in advance. put the pull back.");
+                        this.logger.LogWarning($"block received with height: {inBestChain.Height} and hash: {block.Header.GetHash()} is too far in advance. put the puller back.");
                         this.blockNotification.SyncFrom(this.walletTip.HashBlock);
                         return;
                     }