diff --git a/lib/bcoin/mempool.js b/lib/bcoin/mempool.js
index f1bf5d35..9157dea7 100644
--- a/lib/bcoin/mempool.js
+++ b/lib/bcoin/mempool.js
@@ -97,10 +97,6 @@ Mempool.prototype._init = function _init() {
   });
 };
 
-Mempool.prototype.dynamicMemoryUsage = function dynamicMemoryUsage(callback) {
-  return utils.asyncify(callback)(null, this.totalSize);
-};
-
 Mempool.prototype.open = function open(callback) {
   if (this.loaded)
     return utils.nextTick(callback);
@@ -168,25 +164,50 @@ Mempool.prototype.limitMempoolSize = function limitMempoolSize(callback) {
   });
 };
 
-Mempool.prototype.getRange = function getRange(options, callback) {
-  return callback(null, []);
+Mempool.prototype.getRangeSync = function getRangeSync(options) {
+  return [];
 };
 
-Mempool.prototype.purgeOrphans = function purgeOrphans(callback) {
-  var self = this;
-  var batch = this.db.batch();
+Mempool.prototype.getRange = function getRange(options, callback) {
+  var ret;
 
-  callback = utils.ensure(callback);
+  callback = utils.asyncify(callback);
+
+  try {
+    ret = this.getRangeSync(options);
+  } catch (e) {
+    return callback(e);
+  }
+
+  return callback(null, ret);
+};
+
+Mempool.prototype.purgeOrphansSync = function purgeOrphansSync() {
+  var keys = Object.keys(this.orphans);
+  var key, i;
 
   this.waiting = {};
   this.totalOrphans = 0;
 
-  Object.keys(this.orphans).forEach(function(key) {
-    self.totalSize -= self.orphans[key].length;
-    delete self.orphans[key];
-  });
+  for (i = 0; i < keys.length; i++) {
+    key = keys[i];
+    this.totalSize -= this.orphans[key].length;
+    delete this.orphans[key];
+  }
+};
 
-  return utils.nextTick(callback);
+Mempool.prototype.purgeOrphans = function purgeOrphans(callback) {
+  var ret;
+
+  callback = utils.asyncify(callback);
+
+  try {
+    ret = this.purgeOrphansSync();
+  } catch (e) {
+    return callback(e);
+  }
+
+  return callback(null, ret);
 };
 
 Mempool.prototype.getTXSync = function getTXSync(hash) {
@@ -239,23 +260,31 @@ Mempool.prototype.isDoubleSpendSync = function isDoubleSpendSync(tx) {
 
 Mempool.prototype.get =
 Mempool.prototype.getTX = function getTX(hash, callback) {
+  var tx;
+
   callback = utils.asyncify(callback);
 
   try {
-    return callback(null, this.getTXSync(hash));
+    tx = this.getTXSync(hash);
   } catch (e) {
     return callback(e);
   }
+
+  return callback(null, tx);
 };
 
 Mempool.prototype.getCoin = function getCoin(hash, index, callback) {
+  var coin;
+
   callback = utils.asyncify(callback);
 
   try {
-    return callback(null, this.getCoinSync(hash, index));
+    coin = this.getCoinSync(hash, index);
   } catch (e) {
     return callback(e);
   }
+
+  return callback(null, coin);
 };
 
 Mempool.prototype.isSpent = function isSpent(hash, index, callback) {
@@ -269,13 +298,11 @@ Mempool.prototype.isDoubleSpend = function isDoubleSpend(tx, callback) {
   return callback(null, this.isDoubleSpendSync(tx));
 };
 
-Mempool.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, callback) {
+Mempool.prototype.getCoinsByAddressSync = function getCoinsByAddressSync(addresses) {
   var uniq = {};
   var coins = [];
   var i, j, address, keys, key, coin, parts, hash, index;
 
-  callback = utils.asyncify(callback);
-
   if (!Array.isArray(addresses))
     addresses = [addresses];
 
@@ -283,37 +310,40 @@ Mempool.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, call
 
   for (i = 0; i < addresses.length; i++) {
     address = addresses[i];
-    keys = this.addressMap.getKeys(address);
+    keys = this.addressMap.getCoins(address);
     for (j = 0; j < keys.length; j++) {
       key = keys[j];
       parts = key.split('/');
       hash = parts[0];
       index = +parts[1];
-
-      try {
-        coin = this.getCoinSync(hash, index);
-      } catch (e) {
-        return callback(e);
-      }
-
-      if (!coin)
-        continue;
-
-      coins.push(coin);
+      coin = this.getCoinSync(hash, index);
+      if (coin)
+        coins.push(coin);
     }
   }
 
+  return coins;
+};
+
+Mempool.prototype.getCoinsByAddress = function getCoinsByAddress(addresses, callback) {
+  var coins;
+
+  callback = utils.asyncify(callback);
+
+  try {
+    coins = this.getCoinsByAddressSync(addresses);
+  } catch (e) {
+    return callback(e);
+  }
+
   return callback(null, coins);
 };
 
-Mempool.prototype.getByAddress =
-Mempool.prototype.getTXByAddress = function getTXByAddress(addresses, callback) {
+Mempool.prototype.getTXByAddressSync = function getTXByAddressSync(addresses, callback) {
   var uniq = {};
   var txs = [];
   var i, j, address, hashes, hash, tx;
 
-  callback = utils.asyncify(callback);
-
   if (!Array.isArray(addresses))
     addresses = [addresses];
 
@@ -321,18 +351,14 @@ Mempool.prototype.getTXByAddress = function getTXByAddress(addresses, callback)
 
   for (i = 0; i < addresses.length; i++) {
     address = addresses[i];
-    hashes = this.addressMap.getKeys(address);
+    hashes = this.addressMap.getTX(address);
     for (j = 0; j < hashes.length; j++) {
       hash = hashes[j];
 
       if (uniq[hash])
         continue;
 
-      try {
-        tx = this.getTXSync(hash);
-      } catch (e) {
-        return callback(e);
-      }
+      tx = this.getTXSync(hash);
 
       if (!tx)
         continue;
@@ -343,16 +369,29 @@ Mempool.prototype.getTXByAddress = function getTXByAddress(addresses, callback)
     }
   }
 
-  return callback(null, txs);
+  return txs;
 };
 
-Mempool.prototype.fillTX = function fillTX(tx, callback) {
-  var i, input, tx;
+Mempool.prototype.getByAddress =
+Mempool.prototype.getTXByAddress = function getTXByAddress(addresses, callback) {
+  var txs;
 
   callback = utils.asyncify(callback);
 
+  try {
+    txs = this.getTXByAddressSync(addresses);
+  } catch (e) {
+    return callback(e);
+  }
+
+  return callback(null, txs);
+};
+
+Mempool.prototype.fillTXSync = function fillTXSync(tx) {
+  var i, input, tx;
+
   if (tx.isCoinbase())
-    return callback(null, tx);
+    return tx;
 
   for (i = 0; i < tx.inputs.length; i++) {
     input = tx.inputs[i];
@@ -360,11 +399,7 @@ Mempool.prototype.fillTX = function fillTX(tx, callback) {
     if (input.coin)
       continue;
 
-    try {
-      tx = this.getTXSync(input.prevout.hash);
-    } catch (e) {
-      return callback(e);
-    }
+    tx = this.getTXSync(input.prevout.hash);
 
     if (!tx)
       continue;
@@ -372,16 +407,26 @@ Mempool.prototype.fillTX = function fillTX(tx, callback) {
     input.coin = bcoin.coin(tx, input.prevout.index);
   }
 
+  return tx;
+};
+
+Mempool.prototype.fillTX = function fillTX(tx, callback) {
+  callback = utils.asyncify(callback);
+
+  try {
+    tx = this.fillTXSync(tx);
+  } catch (e) {
+    return callback(e);
+  }
+
   return callback(null, tx);
 };
 
-Mempool.prototype.fillCoins = function fillCoins(tx, callback) {
-  var input;
-
-  callback = utils.asyncify(callback);
+Mempool.prototype.fillCoinsSync = function fillCoinsSync(tx) {
+  var i, input;
 
   if (tx.isCoinbase())
-    return callback(null, tx);
+    return tx;
 
   for (i = 0; i < tx.inputs.length; i++) {
     input = tx.inputs[i];
@@ -396,17 +441,32 @@ Mempool.prototype.fillCoins = function fillCoins(tx, callback) {
     }
   }
 
+  return tx;
+};
+
+Mempool.prototype.fillCoins = function fillCoins(tx, callback) {
+  callback = utils.asyncify(callback);
+
+  try {
+    tx = this.fillCoinsSync(tx);
+  } catch (e) {
+    return callback(e);
+  }
+
   return callback(null, tx);
 };
 
+Mempool.prototype.hasTXSync = function hasTXSync(hash) {
+  if (hash instanceof bcoin.tx)
+    hash = hash.hash('hex');
+
+  return this.txs[hash] != null;
+};
+
 Mempool.prototype.has =
 Mempool.prototype.hasTX = function hasTX(hash, callback) {
   callback = utils.asyncify(callback);
-
-  if (hash instanceof bcoin.tx)
-    hash = hash.hash('hex');
-
-  return callback(null, !!this.txs[hash]);
+  return callback(null, this.hasTXSync(hash));
 };
 
 Mempool.prototype.add =
@@ -459,7 +519,7 @@ Mempool.prototype.addTX = function addTX(tx, callback, force) {
         return callback(new VerifyError(tx, ret.reason, 0));
     }
 
-    self._hasTX(tx, function(err, exists) {
+    self.seenTX(tx, function(err, exists) {
       if (err)
         return callback(err);
 
@@ -524,21 +584,67 @@ function AddressMap() {
   this.map = {};
 }
 
-AddressMap.prototype.getKeys = function getKeys(address) {
-  return this.map[address] || [];
+AddressMap.prototype.getTX = function getTX(address) {
+  var map = this.map[address];
+  var keys = [];
+  var i, key;
+
+  if (!map)
+    return keys;
+
+  for (i = 0; i < map.length; i++) {
+    key = map[i];
+    if (key.length !== 32)
+      continue;
+    keys.push(key.toString('hex'));
+  }
+
+  return keys;
+};
+
+AddressMap.prototype.getCoins = function getCoins(address) {
+  var map = this.map[address];
+  var keys = [];
+  var i, p, key;
+
+  if (!map)
+    return keys;
+
+  for (i = 0; i < map.length; i++) {
+    key = map[i];
+
+    if (key.length !== 36)
+      continue;
+
+    p = new BufferReader(key);
+    p.start();
+
+    try {
+      key = p.readHash('hex') + '/' + p.readU32();
+    } catch (e) {
+      continue;
+    }
+
+    p.end();
+
+    keys.push(key);
+  }
+
+  return keys;
 };
 
 AddressMap.prototype.addTX = function addTX(tx) {
-  var hash = tx.hash('hex');
+  var hash = tx.hash();
   var addresses = tx.getAddresses();
-  var address;
-  var i;
+  var address, i, map, index;
 
   for (i = 0; i < addresses.length; i++) {
     address = addresses[i];
     if (!this.map[address])
       this.map[address] = [];
-    this.map[address].push(hash);
+    map = this.map[address];
+    index = binarySearch(map, hash, true);
+    map.splice(index + 1, 0, hash);
   }
 };
 
@@ -564,24 +670,24 @@ function binarySearch(items, key, insert) {
     return -1;
 
   if (start === 0)
-    return 0;
+    return -1;
 
   return start - 1;
 }
 
 AddressMap.prototype.removeTX = function removeTX(tx) {
+  var hash = tx.hash();
   var addresses = tx.getAddresses();
-  var address;
-  var map, i;
+  var address, map, index;
 
   for (i = 0; i < addresses.length; i++) {
     address = addresses[i];
     map = this.map[address];
 
     if (map) {
-      i = map.indexOf(hash);
-      if (i !== -1)
-        map.splice(i , 1);
+      index = binarySearch(map, hash);
+      if (index !== -1)
+        map.splice(index, 1);
       if (map.length === 0)
         delete this.map[address];
     }
@@ -590,32 +696,42 @@ AddressMap.prototype.removeTX = function removeTX(tx) {
 
 AddressMap.prototype.addCoin = function addCoin(coin) {
   var address = coin.getAddress();
-  var key = coin.hash + '/' + coin.index;
+  var key = this._coinKey(coin.hash, coin.index);
+  var map, index;
 
   if (address) {
     if (!this.map[address])
       this.map[address] = [];
-    this.map[address].push(key);
+    map = this.map[address];
+    index = binarySearch(map, key, true);
+    map.splice(index + 1, 0, key);
   }
 };
 
+AddressMap.prototype._coinKey = function _coinKey(hash, index) {
+  var p = new BufferWriter();
+  p.writeHash(hash);
+  p.writeU32(index);
+  return p.render();
+};
+
 AddressMap.prototype.removeCoin = function removeCoin(tx, i) {
-  var address, key, map, i;
+  var address, key, map, index;
 
   if (tx instanceof bcoin.input) {
     address = tx.getAddress();
-    key = tx.prevout.hash + '/' + tx.prevout.index;
+    key = this._coinKey(tx.prevout.hash, tx.prevout.index);
   } else {
     address = tx.outputs[i].getAddress();
-    key = tx.hash('hex') + '/' + i;
+    key = this._coinKey(tx.hash(), i);
   }
 
   map = this.map[address];
 
   if (map) {
-    i = map.indexOf(key);
-    if (i !== -1)
-      map.splice(i, 1);
+    index = binarySearch(map, key);
+    if (index !== -1)
+      map.splice(index, 1);
     if (map.length === 0)
       delete this.map[address];
   }
@@ -624,35 +740,38 @@ AddressMap.prototype.removeCoin = function removeCoin(tx, i) {
 Mempool.prototype.addUnchecked = function addUnchecked(tx, callback) {
   var self = this;
   var hash = tx.hash('hex');
+  var input, output, i, key, coin;
 
   this.txs[hash] = tx.toExtended();
 
   this.addressMap.addTX(tx);
 
-  tx.inputs.forEach(function(input, i) {
-    var key = input.prevout.hash + '/' + input.prevout.index;
-    delete self.coins[key];
-    self.spent[key] = hash;
-    self.addressMap.removeCoin(input);
-  });
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+    key = input.prevout.hash + '/' + input.prevout.index;
+    delete this.coins[key];
+    this.spent[key] = hash;
+    this.addressMap.removeCoin(input);
+  }
 
-  tx.outputs.forEach(function(output, i) {
-    var coin = bcoin.coin(tx, i);
-    var key = coin.hash + '/' + coin.index;
-    self.coins[key] = coin.toRaw();
-    self.addressMap.addCoin(coin);
-  });
+  for (i = 0; i < tx.outputs.length; i++) {
+    output = tx.outputs[i];
+    coin = bcoin.coin(tx, i);
+    key = coin.hash + '/' + coin.index;
+    this.coins[key] = coin.toRaw();
+    this.addressMap.addCoin(coin);
+  }
 
-  self.totalSize += tx.getSize();
-  self.emit('tx', tx);
-  self.emit('add tx', tx);
+  this.totalSize += tx.getSize();
+  this.emit('tx', tx);
+  this.emit('add tx', tx);
 
   utils.debug('Added tx %s to the mempool.', tx.rhash);
 
-  if (self.options.relay)
-    self.node.broadcast(tx);
+  if (this.options.relay)
+    this.node.broadcast(tx);
 
-  self.resolveOrphans(tx, function(err, resolved) {
+  this.resolveOrphans(tx, function(err, resolved) {
     if (err)
       return callback(err);
 
@@ -669,7 +788,7 @@ Mempool.prototype.addUnchecked = function addUnchecked(tx, callback) {
 
 Mempool.prototype.removeUnchecked = function removeUnchecked(tx, callback) {
   var self = this;
-  var hash;
+  var hash, input, output, i, key, coin;
 
   callback = utils.asyncify(callback);
 
@@ -689,24 +808,24 @@ Mempool.prototype.removeUnchecked = function removeUnchecked(tx, callback) {
 
   this.addressMap.removeTX(tx);
 
-  tx.inputs.forEach(function(input, i) {
-    var key = input.prevout.hash + '/' + input.prevout.index;
-    delete self.coins[key];
-    delete self.spent[key];
-    self.addressMap.removeCoin(input);
-  });
+  for (i = 0; i < tx.inputs.length; i++) {
+    inputs = tx.outputs[i];
+    key = input.prevout.hash + '/' + input.prevout.index;
+    delete this.coins[key];
+    delete this.spent[key];
+    this.addressMap.removeCoin(input);
+  }
 
-  tx.outputs.forEach(function(output, i) {
-    var address = output.getAddress();
-    var key = hash + '/' + i;
+  for (i = 0; i < tx.outputs.length; i++) {
+    output = tx.outputs[i];
+    key = hash + '/' + i;
+    delete this.coins[key];
+    delete this.spent[key];
+    this.addressMap.removeCoin(tx, i);
+  }
 
-    delete self.coins[key];
-    delete self.spent[key];
-    self.addressMap.removeCoin(tx, i);
-  });
-
-  self.totalSize -= tx.getSize();
-  self.emit('remove tx', tx);
+  this.totalSize -= tx.getSize();
+  this.emit('remove tx', tx);
 
   return callback();
 };
@@ -874,7 +993,7 @@ Mempool.prototype.hasOrphanSync = function hasOrphanSync(hash) {
   if (hash instanceof bcoin.tx)
     hash = hash.hash('hex');
 
-  return !!this.orphans[hash];
+  return this.orphans[hash] != null;
 };
 
 Mempool.prototype.getOrphanSync = function getOrphanSync(hash) {
@@ -910,31 +1029,19 @@ Mempool.prototype.getOrphan = function getOrphan(hash, callback) {
   return callback(null, orphan);
 };
 
-Mempool.prototype._hasTX = function hasTX(tx, callback) {
-  var self = this;
+Mempool.prototype.seenTX = function hasTX(tx, callback) {
   var hash = tx.hash('hex');
 
-  this.node.hasTX(hash, function(err, result) {
-    if (err)
-      return callback(err);
+  if (this.hasOrphanSync(hash))
+    return utils.asyncify(callback)(null, true);
 
-    if (result)
-      return callback(null, result);
-
-    self.hasOrphan(hash, function(err, result) {
-      if (err)
-        return callback(err);
-
-      return callback(null, result);
-    });
-  });
+  return this.node.hasTX(hash, callback);
 };
 
-Mempool.prototype.storeOrphan = function storeOrphan(tx, callback) {
-  var self = this;
+Mempool.prototype.storeOrphanSync = function storeOrphanSync(tx) {
   var prevout = {};
-  var hash = tx.hash('hex');
-  var i, input, p;
+  var hash = tx.hash();
+  var i, input, key;
 
   for (i = 0; i < tx.inputs.length; i++) {
     input = tx.inputs[i];
@@ -946,74 +1053,99 @@ Mempool.prototype.storeOrphan = function storeOrphan(tx, callback) {
 
   assert(prevout.length > 0);
 
-  prevout.forEach(function(key) {
-    if (!self.waiting[key])
-      self.waiting[key] = [];
+  for (i = 0; i < prevout.length; i++) {
+    key = prevout[i];
 
-    self.waiting[key].push(hash);
-  });
+    if (!this.waiting[key])
+      this.waiting[key] = [];
 
-  self.totalOrphans++;
+    this.waiting[key].push(hash);
+  }
 
-  self.orphans[hash] = tx.toExtended(true);
+  this.totalOrphans++;
 
-  if (self.totalOrphans > Mempool.MAX_ORPHAN_TX)
-    return self.purgeOrphans(callback);
+  this.orphans[hash.toString('hex')] = tx.toExtended(true);
 
-  return utils.nextTick(callback);
+  if (this.totalOrphans > Mempool.MAX_ORPHAN_TX)
+    this.purgeOrphansSync();
+
+  return tx;
 };
 
-Mempool.prototype.getBalance = function getBalance(callback) {
-  var coins = [];
-  var hashes = Object.keys(this.coins);
-  var parts, hash, index, i, coin;
-  var unconfirmed = new bn(0);
-  var confirmed = new bn(0);
+Mempool.prototype.storeOrphan = function storeOrphan(tx, callback) {
+  var ret;
 
   callback = utils.asyncify(callback);
 
+  try {
+    ret = this.storeOrphanSync(tx);
+  } catch (e) {
+    return callback(e);
+  }
+
+  return callback(null, ret);
+};
+
+Mempool.prototype.getBalanceSync = function getBalanceSync() {
+  var coins = [];
+  var hashes = Object.keys(this.coins);
+  var balance = new bn(0);
+  var parts, hash, index, i, coin;
+
   for (i = 0; i < hashes.length; i++) {
     parts = hashes[i].split('/');
     hash = parts[0];
     index = +parts[1];
-
-    try {
-      coin = this.getCoinSync(hash, index);
-    } catch (e) {
-      return callback(e);
-    }
-
+    coin = this.getCoinSync(hash, index);
     coins.push(coin);
   }
 
-  for (i = 0; i < coins.length; i++) {
-    coin = coins[i];
-    if (coin.height !== -1)
-      confirmed.iadd(coin.value);
-    unconfirmed.iadd(coin.value);
-  }
+  for (i = 0; i < coins.length; i++)
+    balance.iadd(coins[i].value);
 
-  return callback(null, {
-    unconfirmed: unconfirmed,
-    confirmed: confirmed
-  });
+  return {
+    unconfirmed: balance,
+    confirmed: new bn(0)
+  };
 };
 
-Mempool.prototype.getAll = function getAll(callback) {
+Mempool.prototype.getBalance = function getBalance(callback) {
+  var balance;
+
+  callback = utils.asyncify(callback);
+
+  try {
+    balance = this.getBalanceSync();
+  } catch (e) {
+    return callback(e);
+  }
+
+  return callback(null, balance);
+};
+
+Mempool.prototype.getAllSync = function getAllSync() {
   var txs = [];
   var hashes = Object.keys(this.txs);
   var i, tx;
 
+  for (i = 0; i < hashes.length; i++) {
+    tx = this.getTXSync(hashes[i]);
+    if (tx)
+      txs.push(tx);
+  }
+
+  return txs;
+};
+
+Mempool.prototype.getAll = function getAll(callback) {
+  var txs;
+
   callback = utils.asyncify(callback);
 
-  for (i = 0; i < hashes.length; i++) {
-    try {
-      tx = this.getTXSync(hashes[i]);
-    } catch (e) {
-      return callback(e);
-    }
-
-    txs.push(tx);
+  try {
+    txs = this.getAllSync();
+  } catch (e) {
+    return callback(e);
   }
 
   return callback(null, txs);
@@ -1029,7 +1161,10 @@ Mempool.prototype.resolveOrphans = function resolveOrphans(tx, callback) {
     return callback(null, resolved);
 
   utils.forEachSerial(hashes, function(orphanHash, next, i) {
-    var orphan = self.orphans[orphanHash];
+    var orphan;
+
+    orphanHash = orphanHash.toString('hex');
+    orphan = self.orphans[orphanHash];
 
     if (!orphan)
       return next();
@@ -1072,8 +1207,12 @@ Mempool.prototype.resolveOrphans = function resolveOrphans(tx, callback) {
   });
 };
 
+Mempool.prototype.getSnapshotSync = function getSnapshotSync() {
+  return Object.keys(this.txs);
+};
+
 Mempool.prototype.getSnapshot = function getSnapshot(callback) {
-  return utils.asyncify(callback)(null, Object.keys(this.txs));
+  return utils.asyncify(callback)(null, this.getSnapshotSync());
 };
 
 Mempool.prototype.checkLocks = function checkLocks(tx, flags, callback) {