block: only cache block summary with height if confirmed >= 6

- update api with changes in bitcore node
- add block event

lib/blocks.js

@@ -13,6 +13,7 @@ function BlockController(node) {
   this.node = node;
 
   this.blockSummaryCache = LRU(1000000);
+  this.blockSummaryCacheConfirmations = 6;
   this.blockCache = LRU(1000);
 
   this.poolStrings = {};
@@ -125,11 +126,12 @@ BlockController.prototype._getBlockSummary = function(hash, moreTs, next) {
     finish(summaryCache);
   } else {
     self.node.services.bitcoind.getRawBlock(hash, function(err, blockBuffer) {
-      if(err) {
+      if (err) {
         return next(err);
       }
 
       var br = new bitcore.encoding.BufferReader(blockBuffer);
+
       // take a shortcut to get number of transactions and the blocksize.
       // Also reads the coinbase transaction and only that.
       // Old code parsed all transactions in every block _and_ then encoded
@@ -142,9 +144,13 @@ BlockController.prototype._getBlockSummary = function(hash, moreTs, next) {
       info.transactions = [bitcore.Transaction().fromBufferReader(br)];
 
       self.node.services.bitcoind.getBlockHeader(hash, function(err, blockHeader) {
+        if (err) {
+          return next(err);
+        }
+        var height = blockHeader.height;
 
-        var block = {
-          height: blockHeader.height,
+        var summary = {
+          height: height,
           size: blockBuffer.length,
           hash: hash,
           time: header.time,
@@ -152,9 +158,12 @@ BlockController.prototype._getBlockSummary = function(hash, moreTs, next) {
           poolInfo: self.getPoolInfo(info)
         };
 
-        self.blockSummaryCache.set(hash, summary);
+        var confirmations = self.node.services.bitcoind.height - height + 1;
+        if (confirmations >= self.blockSummaryCacheConfirmations) {
+          self.blockSummaryCache.set(hash, summary);
+        }
 
-        finish(block);
+        finish(summary);
       });
     });
 

lib/index.js

@@ -84,8 +84,8 @@ InsightAPI.prototype.getRoutePrefix = function() {
 };
 
 InsightAPI.prototype.start = function(callback) {
-  this.node.services.bitcoind.on('tx', this.transactionHandler.bind(this));
-
+  this.node.services.bitcoind.on('tx', this.transactionEventHandler.bind(this));
+  this.node.services.bitcoind.on('block', this.blockEventHandler.bind(this));
   setImmediate(callback);
 };
 
@@ -213,18 +213,13 @@ InsightAPI.prototype.getPublishEvents = function() {
   ];
 };
 
-InsightAPI.prototype.blockHandler = function(block, add, callback) {
+InsightAPI.prototype.blockEventHandler = function(hashBuffer) {
   // Notify inv subscribers
   for (var i = 0; i < this.subscriptions.inv.length; i++) {
-    this.subscriptions.inv[i].emit('block', block.hash);
+    this.subscriptions.inv[i].emit('block', hashBuffer.toString('hex'));
   }
-
-  setImmediate(function() {
-    callback(null, []);
-  });
 };
-
-InsightAPI.prototype.transactionHandler = function(txBuffer) {
+InsightAPI.prototype.transactionEventHandler = function(txBuffer) {
   var tx = new Transaction().fromBuffer(txBuffer);
   var result = this.txController.transformInvTransaction(tx);
 

lib/transactions.js

@@ -24,7 +24,7 @@ TxController.prototype.show = function(req, res) {
 TxController.prototype.transaction = function(req, res, next, txid) {
   var self = this;
 
-  this.node.getTransactionWithBlockInfo(txid, true, function(err, transaction) {
+  this.node.getTransactionWithBlockInfo(txid, function(err, transaction) {
     if (err && err instanceof self.node.errors.Transaction.NotFound) {
       return common.handleErrors(null, res);
     } else if(err) {
@@ -231,7 +231,7 @@ TxController.prototype.transformInvTransaction = function(transaction) {
 TxController.prototype.rawTransaction = function(req, res, next, txid) {
   var self = this;
 
-  this.node.getTransaction(txid, true, function(err, transaction) {
+  this.node.getTransaction(txid, function(err, transaction) {
     if (err && err instanceof self.node.errors.Transaction.NotFound) {
       return common.handleErrors(null, res);
     } else if(err) {