diff --git a/lib/mempool/mempool.js b/lib/mempool/mempool.js
index 39bffa6b..8fd2052e 100644
--- a/lib/mempool/mempool.js
+++ b/lib/mempool/mempool.js
@@ -9,6 +9,8 @@
 var AsyncObject = require('../utils/async');
 var constants = require('../protocol/constants');
 var util = require('../utils/util');
+var BufferReader = require('../utils/reader');
+var BufferWriter = require('../utils/writer');
 var co = require('../utils/co');
 var assert = require('assert');
 var crypto = require('../crypto/crypto');
@@ -22,6 +24,7 @@ var Coin = require('../primitives/coin');
 var Locker = require('../utils/locker');
 var Outpoint = require('../primitives/outpoint');
 var TX = require('../primitives/tx');
+var Coin = require('../primitives/coin');
 var MempoolEntry = require('./mempoolentry');
 
 /**
@@ -1310,7 +1313,7 @@ Mempool.prototype.storeOrphan = function storeOrphan(tx) {
     this.waiting[prev].push(hash);
   }
 
-  this.orphans[hash] = tx.toExtended(true);
+  this.orphans[hash] = toOrphanRaw(tx);
   this.totalOrphans++;
 
   this.logger.debug('Added orphan %s to mempool.', tx.txid());
@@ -1389,7 +1392,7 @@ Mempool.prototype.getOrphan = function getOrphan(hash) {
     return;
 
   try {
-    orphan = TX.fromExtended(data, true);
+    orphan = fromOrphanRaw(data);
   } catch (e) {
     delete this.orphans[hash];
     this.logger.warning('%s %s',
@@ -1444,7 +1447,7 @@ Mempool.prototype.resolveOrphans = function resolveOrphans(tx) {
       continue;
     }
 
-    this.orphans[orphanHash] = orphan.toExtended(true);
+    this.orphans[orphanHash] = toOrphanRaw(orphan);
   }
 
   delete this.waiting[hash];
@@ -1981,6 +1984,53 @@ AddressIndex.prototype.removeCoin = function removeCoin(coin) {
   delete this.map[key];
 };
 
+/*
+ * Helpers
+ */
+
+function toOrphanRaw(tx) {
+  var bw = new BufferWriter();
+  var i, input;
+
+  tx.toWriter(bw);
+
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+
+    if (!input.coin) {
+      bw.writeU8(0);
+      continue;
+    }
+
+    bw.writeU8(1);
+    input.coin.toWriter(bw);
+  }
+
+  return bw.render();
+};
+
+function fromOrphanRaw(data) {
+  var br = new BufferReader(data);
+  var i, tx, input, coin;
+
+  tx = TX.fromReader(br);
+
+  for (i = 0; i < tx.inputs.length; i++) {
+    input = tx.inputs[i];
+
+    if (br.readU8() === 0)
+      continue;
+
+    coin = Coin.fromReader(br);
+    coin.hash = input.prevout.hash;
+    coin.index = input.prevout.index;
+
+    input.coin = coin;
+  }
+
+  return tx;
+}
+
 /*
  * Expose
  */
diff --git a/lib/primitives/tx.js b/lib/primitives/tx.js
index 03a4196c..d2dcb134 100644
--- a/lib/primitives/tx.js
+++ b/lib/primitives/tx.js
@@ -2435,17 +2435,20 @@ TX.isWitness = function isWitness(br) {
  * This is the serialization format BCoin uses internally
  * to store transactions in the database. The extended
  * serialization includes the height, block hash, index,
- * timestamp, pending-since time, and optionally a vector
- * for the serialized coins.
- * @param {Boolean?} saveCoins - Whether to serialize the coins.
+ * timestamp, and pending-since time.
  * @returns {Buffer}
  */
 
-TX.prototype.toExtended = function toExtended(saveCoins) {
+TX.prototype.toExtended = function toExtended() {
   var bw = new BufferWriter();
   var height = this.height;
   var index = this.index;
-  var i, input, field, bit, oct;
+
+  if (height === -1)
+    height = 0x7fffffff;
+
+  if (index === -1)
+    index = 0x7fffffff;
 
   this.toWriter(bw);
 
@@ -2458,49 +2461,21 @@ TX.prototype.toExtended = function toExtended(saveCoins) {
     bw.writeU8(0);
   }
 
-  if (height === -1)
-    height = 0x7fffffff;
-
-  if (index === -1)
-    index = 0x7fffffff;
-
   bw.writeU32(height);
   bw.writeU32(this.ts);
   bw.writeU32(index);
 
-  if (saveCoins) {
-    field = new Buffer(Math.ceil(this.inputs.length / 8));
-    field.fill(0);
-
-    bw.writeBytes(field);
-
-    for (i = 0; i < this.inputs.length; i++) {
-      input = this.inputs[i];
-
-      if (!input.coin) {
-        bit = i % 8;
-        oct = (i - bit) / 8;
-        field[oct] |= 1 << (7 - bit);
-        continue;
-      }
-
-      input.coin.toWriter(bw);
-    }
-  }
-
   return bw.render();
 };
 
 /**
  * Inject properties from "extended" serialization format.
+ * @private
  * @param {Buffer} data
- * @param {Boolean?} saveCoins - If true, the function will
- * attempt to parse the coins.
  */
 
-TX.prototype.fromExtended = function fromExtended(data, saveCoins) {
+TX.prototype.fromExtended = function fromExtended(data) {
   var br = new BufferReader(data);
-  var i, input, coin, field, bit, oct, spent;
 
   this.fromReader(br);
 
@@ -2519,27 +2494,6 @@ TX.prototype.fromExtended = function fromExtended(data, saveCoins) {
   if (this.index === 0x7fffffff)
     this.index = -1;
 
-  if (saveCoins) {
-    field = br.readBytes(Math.ceil(this.inputs.length / 8), true);
-
-    for (i = 0; i < this.inputs.length; i++) {
-      input = this.inputs[i];
-
-      bit = i % 8;
-      oct = (i - bit) / 8;
-      spent = (field[oct] >>> (7 - bit)) & 1;
-
-      if (spent)
-        continue;
-
-      coin = Coin.fromReader(br);
-      coin.hash = input.prevout.hash;
-      coin.index = input.prevout.index;
-
-      input.coin = coin;
-    }
-  }
-
   return this;
 };
 
@@ -2547,22 +2501,14 @@ TX.prototype.fromExtended = function fromExtended(data, saveCoins) {
  * Instantiate a transaction from a Buffer
  * in "extended" serialization format.
  * @param {Buffer} data
- * @param {Boolean?} saveCoins - If true, the function will
- * attempt to parse the coins.
  * @param {String?} enc - One of `"hex"` or `null`.
  * @returns {TX}
  */
 
-TX.fromExtended = function fromExtended(data, saveCoins, enc) {
-  if (typeof saveCoins === 'string') {
-    enc = saveCoins;
-    saveCoins = false;
-  }
-
+TX.fromExtended = function fromExtended(data, enc) {
   if (typeof data === 'string')
     data = new Buffer(data, enc);
-
-  return new TX().fromExtended(data, saveCoins);
+  return new TX().fromExtended(data);
 };
 
 /**