Reorgs and sync

lib/node.js

@@ -35,7 +35,29 @@ var BitcoreNode = function(bus, networkMonitor, blockService, transactionService
   this.transactionService = transactionService;
   this.blockService = blockService;
 
-  this.bus.register(bitcore.Block, this.blockService.onBlock.bind(this.blockService));
+  this.blockCache = {};
+
+  this.bus.register(bitcore.Block, function(block) {
+
+    var prevHash = bitcore.util.buffer.reverse(block.header.prevHash).toString('hex');
+    self.blockCache[block.hash] = block;
+
+    if (!self.blockchain.hasData(prevHash)) {
+      self.networkMonitor.requestBlocks(self.blockchain.getBlockLocator());
+      return;
+    }
+
+    var blockchainChanges = self.blockchain.proposeNewBlock(block);
+    Promise.series(blockchainChanges.unconfirmed.map(function(hash) {
+      return self.blockService.unconfirm(self.blockCache[hash]);
+    }))
+    .then(Promise.series(blockchainChanges.confirmed.map(function(hash) {
+      return self.blockService.confirm(self.blockCache[hash]);
+    })))
+    .then(function() {
+      self.networkMonitor.requestBlocks(self.blockchain.getBlockLocator());
+    });
+  });
 
   this.bus.onAny(function(value) {
     self.emit(this.event, value);
@@ -82,8 +104,18 @@ BitcoreNode.create = function(opts) {
 };
 
 BitcoreNode.prototype.start = function() {
-  this.sync();
-  this.networkMonitor.start();
+  var self = this;
+  this.blockService.getBlockchain().then(function(blockchain) {
+    if (!blockchain) {
+      self.blockchain = new BlockChain();
+      self.blockchain.setTip(genesis);
+    }
+    self.sync();
+    self.networkMonitor.start();
+  });
+  this.networkMonitor.on('stop', function() {
+    self.blockService.saveBlockchain(self.blockchain);
+  });
 };
 
 BitcoreNode.prototype.stop = function() {
@@ -92,24 +124,15 @@ BitcoreNode.prototype.stop = function() {
 
 
 BitcoreNode.prototype.sync = function() {
-  var genesis = bitcore.Block.fromBuffer(genesisBlocks[bitcore.Networks.defaultNetwork.name]);
   var self = this;
   this.networkMonitor.on('ready', function() {
     self.blockService.getBlockchain().then(function(blockchain) {
-        if (blockchain) {
-          self.blockchain = blockchain;
-        } else {
-          self.blockchain = new BlockChain();
-          self.blockchain.setTip(genesis);
-        }
-        self.networkMonitor.requestBlocks(self.blockchain.tip);
-      })
-      .catch(function(err) {
-        self.networkMonitor.stop();
-        throw err;
-      });
+      self.networkMonitor.requestBlocks(self.blockchain.getBlockLocator());
+    }).catch(function(err) {
+      self.networkMonitor.stop();
+      throw err;
+    });
   });
 };
 
-
 module.exports = BitcoreNode;

lib/services/block.js

@@ -226,9 +226,8 @@ BlockService.prototype.onBlock = function(block) {
  * @param {bitcore.Block} block
  * @return {Promise<Block>} a promise of the same block, for chaining
  */
-BlockService.prototype.save = function(block) {
+BlockService.prototype.unconfirm = function(block) {
   // TODO: unconfirm previous tip, confirm new tip. 
-  return this._confirmBlock(block);
 };
 
 
@@ -238,7 +237,7 @@ BlockService.prototype.save = function(block) {
  * @param {bitcore.Block} block
  * @return {Promise<Block>} a promise of the same block, for chaining
  */
-BlockService.prototype._confirmBlock = function(block) {
+BlockService.prototype.confirm = function(block) {
   $.checkArgument(block instanceof bitcore.Block);
 
   var self = this;