minor improvements.

lib/bcoin/chain.js

@@ -105,6 +105,9 @@ Chain.prototype._init = function _init() {
     if (!self.synced && self.height < self.network.block.slowHeight)
       return;
 
+    if (self.options.spv)
+      return;
+
     bcoin.debug('Block %s (%d) added to chain.',
       utils.revHex(entry.hash), entry.height);
   });
@@ -285,6 +288,7 @@ Chain.prototype._preload = function _preload(callback) {
   var buf, height, stream;
   var request = require('./http/request');
   var locker = new bcoin.locker();
+  var flushed = 0;
 
   if (!this.options.preload)
     return callback();
@@ -295,7 +299,7 @@ Chain.prototype._preload = function _preload(callback) {
   if (this.network.type !== 'main')
     return callback();
 
-  bcoin.debug('Loading %s', url);
+  bcoin.debug('Loading %s.', url);
 
   function parseHeader(buf) {
     var headers = bcoin.protocol.parser.parseBlockHeaders(buf);
@@ -315,6 +319,9 @@ Chain.prototype._preload = function _preload(callback) {
         return callback(err);
       }
 
+      if ((++flushed % 50000) === 0)
+        utils.print('Flushed %d headers to DB.', flushed);
+
       if (locker.jobs.length === 0 && save.ended)
         return callback();
 
@@ -334,10 +341,16 @@ Chain.prototype._preload = function _preload(callback) {
     };
 
     stream.on('response', function(res) {
+      var height = +res.headers['content-length'] / 80 | 0;
       if (res.statusCode >= 400) {
         stream.destroy();
         return callback(new Error('Bad response code: ' + res.statusCode));
       }
+      if (chainHeight > height - 30000) {
+        bcoin.debug('Preload height is %d. Skipping.', height);
+        stream.destroy();
+        return callback();
+      }
     });
 
     stream.on('error', function(err) {
@@ -365,9 +378,6 @@ Chain.prototype._preload = function _preload(callback) {
         buf.size += data.length;
       }
 
-      if (blocks.length === 0)
-        return;
-
       for (i = 0; i < blocks.length; i++) {
         data = blocks[i];
 
@@ -405,9 +415,7 @@ Chain.prototype._preload = function _preload(callback) {
         // Create a chain entry.
         entry = new bcoin.chainentry(self, data, lastEntry);
 
-        if (entry.height <= chainHeight)
-          self.db.addCache(entry);
-        else
+        if (entry.height > chainHeight)
           save(entry);
 
         if ((height + 1) % 50000 === 0)

lib/bcoin/pool.js

@@ -1283,6 +1283,8 @@ Pool.prototype._removePeer = function _removePeer(peer) {
  */
 
 Pool.prototype.watch = function watch(data, enc) {
+  if (!this.options.spv)
+    return;
   this.spvFilter.add(data, enc);
   this.updateWatch();
 };
@@ -1292,6 +1294,8 @@ Pool.prototype.watch = function watch(data, enc) {
  */
 
 Pool.prototype.unwatch = function unwatch() {
+  if (!this.options.spv)
+    return;
   this.spvFilter.reset();
   this.updateWatch();
 };

lib/bcoin/spvnode.js

@@ -160,21 +160,6 @@ SPVNode.prototype._init = function _init() {
         });
       });
     },
-    function(next) {
-      var i;
-      self.walletdb.getUnconfirmed(function(err, txs) {
-        if (err)
-          return next(err);
-
-        if (txs.length > 0)
-          bcoin.debug('Rebroadcasting %d transactions.', txs.length);
-
-        for (i = 0; i < txs.length; i++)
-          self.pool.broadcast(txs[i]);
-
-        next();
-      });
-    },
     function(next) {
       var i;
       self.walletdb.getAddresses(function(err, hashes) {
@@ -190,6 +175,21 @@ SPVNode.prototype._init = function _init() {
         next();
       });
     },
+    function(next) {
+      var i;
+      self.walletdb.getUnconfirmed(function(err, txs) {
+        if (err)
+          return next(err);
+
+        if (txs.length > 0)
+          bcoin.debug('Rebroadcasting %d transactions.', txs.length);
+
+        for (i = 0; i < txs.length; i++)
+          self.pool.broadcast(txs[i]);
+
+        next();
+      });
+    },
     function(next) {
       if (!self.chain.options.preload)
         return next();