diff --git a/lib/bcoin/chain.js b/lib/bcoin/chain.js
index 6551225d..24163ec9 100644
--- a/lib/bcoin/chain.js
+++ b/lib/bcoin/chain.js
@@ -34,7 +34,6 @@ var VerifyError = utils.VerifyError;
  * @property {Locker} locker
  * @property {Object} invalid
  * @property {Number} bestHeight
- * @property {Number} lastUpdate
  * @property {ChainBlock?} tip
  * @property {Number} height
  * @property {Boolean} segwitActive
@@ -75,7 +74,6 @@ function Chain(options) {
   this.locker = new bcoin.locker(this, this.add, this.pendingLimit);
   this.invalid = {};
   this.bestHeight = -1;
-  this.lastUpdate = utils.now();
   this.tip = null;
   this.height = -1;
   this.synced = false;
@@ -717,7 +715,7 @@ Chain.prototype._checkDuplicates = function _checkDuplicates(block, prev, callba
   if (network.block.bip34height === -1 || height <= network.block.bip34height)
     return this._findDuplicates(block, prev, callback);
 
-  self.db.get(network.block.bip34height, function(err, entry) {
+  this.db.get(network.block.bip34height, function(err, entry) {
     if (err)
       return callback(err);
 
@@ -1206,10 +1204,6 @@ Chain.prototype._setBestChain = function _setBestChain(entry, prev, block, callb
     });
   }
 
-  // Update the timestamp to
-  // maintain a time delta of blocks.
-  this.lastUpdate = utils.now();
-
   // We don't have a genesis block yet.
   if (!this.tip) {
     if (entry.hash !== network.genesis.hash) {
@@ -1827,22 +1821,6 @@ Chain.prototype.getOrphan = function getOrphan(hash) {
   return this.orphan.bmap[hash] || null;
 };
 
-/**
- * Test the chain to see if it is synced.
- * @returns {Boolean}
- */
-
-Chain.prototype.isFullLegacy = function isFull() {
-  var delta;
-
-  if (!this.tip)
-    return false;
-
-  delta = utils.now() - this.tip.ts;
-
-  return delta < 4 * 60 * 60;
-};
-
 /**
  * Test the chain to see if it is synced.
  * @returns {Boolean}
@@ -1852,27 +1830,6 @@ Chain.prototype.isFull = function isFull() {
   return !this.isInitial();
 };
 
-/**
- * Test the chain to see if it is still in the initial
- * syncing phase. Mimic's bitcoind's `IsInitialBlockDownload()`
- * function.
- * @see IsInitalBlockDownload()
- * @returns {Boolean}
- */
-
-Chain.prototype.isInitialLegacy = function isInitial() {
-  var now, delta;
-
-  if (!this.tip)
-    return true;
-
-  now = utils.now();
-  delta = now - this.lastUpdate;
-
-  // Should mimic the original IsInitialBlockDownload() function
-  return delta < 10 && this.tip.ts < now - 24 * 60 * 60;
-};
-
 /**
  * Test the chain to see if it is still in the initial
  * syncing phase. Mimic's bitcoind's `IsInitialBlockDownload()`