diff --git a/lib/bcoin/mtx.js b/lib/bcoin/mtx.js
index 7002dd6e..25b55c89 100644
--- a/lib/bcoin/mtx.js
+++ b/lib/bcoin/mtx.js
@@ -62,10 +62,6 @@ function MTX(options) {
 
 utils.inherits(MTX, bcoin.tx);
 
-MTX.prototype._init = function _init() {
-  ;
-};
-
 MTX.prototype.clone = function clone() {
   var tx = new MTX(this);
 
diff --git a/lib/bcoin/tx.js b/lib/bcoin/tx.js
index 1f9c8cc7..c92cdd5e 100644
--- a/lib/bcoin/tx.js
+++ b/lib/bcoin/tx.js
@@ -40,24 +40,17 @@ function TX(data, block) {
 
   this._chain = data.chain;
 
-  if (data.inputs) {
-    assert(this.inputs.length === 0);
-    data.inputs.forEach(function(input) {
-      this.addInput(input);
-    }, this);
-  }
+  // assert(data.inputs.length !== 0);
+  // assert(data.outputs.length !== 0);
 
-  if (data.outputs) {
-    assert(this.outputs.length === 0);
-    data.outputs.forEach(function(output) {
-      this.addOutput(output);
-    }, this);
-  }
+  data.inputs.forEach(function(input) {
+    this.inputs.push(new bcoin.input(input));
+  }, this);
 
-  this._init(block);
-}
+  data.outputs.forEach(function(output) {
+    this.outputs.push(new bcoin.output(output));
+  }, this);
 
-TX.prototype._init = function _init(block) {
   if (block && this.ts === 0) {
     if (block.type === 'merkleblock') {
       if (block.hasTX(this.hash('hex')))
@@ -72,7 +65,7 @@ TX.prototype._init = function _init(block) {
 
   if (!this._size)
     this._size = this._raw.length;
-};
+}
 
 TX.prototype.setBlock = function setBlock(block) {
   this.relayedBy = block.relayedBy;
@@ -84,15 +77,21 @@ TX.prototype.setBlock = function setBlock(block) {
 TX.prototype.clone = function clone() {
   var tx = new TX(this);
 
-  tx.inputs = tx.inputs.map(function(input) {
-    input.script = input.script.slice();
-    return input;
-  });
+  // tx.inputs = tx.inputs.map(function(input) {
+  //   var _raw = input.script._raw;
+  //   input.script = input.script.slice();
+  //   if (_raw)
+  //     utils.hidden(input.script, '_raw', _raw);
+  //   return input;
+  // });
 
-  tx.outputs = tx.outputs.map(function(output) {
-    output.script = output.script.slice();
-    return output;
-  });
+  // tx.outputs = tx.outputs.map(function(output) {
+  //   var _raw = output.script._raw;
+  //   output.script = output.script.slice();
+  //   if (_raw)
+  //     utils.hidden(output.script, '_raw', _raw);
+  //   return output;
+  // });
 
   delete tx._raw;
   delete tx._size;
@@ -101,16 +100,10 @@ TX.prototype.clone = function clone() {
 };
 
 TX.prototype.hash = function hash(enc) {
-  var hash;
+  if (!this._hash)
+    this._hash = utils.dsha256(this.render());
 
-  if (this._hash)
-    return enc === 'hex' ? utils.toHex(this._hash) : this._hash;
-
-  hash = utils.dsha256(this._raw);
-
-  this._hash = hash;
-
-  return enc === 'hex' ? utils.toHex(hash) : hash;
+  return enc === 'hex' ? utils.toHex(this._hash) : this._hash;
 };
 
 TX.prototype.render = function render() {
@@ -123,14 +116,6 @@ TX.prototype.getSize = function getSize() {
   return this._size || this.render().length;
 };
 
-TX.prototype.addInput = function addInput(input) {
-  assert(input.prevout);
-
-  input = bcoin.input(input);
-
-  this.inputs.push(input);
-};
-
 TX.prototype._inputIndex = function _inputIndex(hash, index) {
   var i, ex;
 
@@ -143,12 +128,6 @@ TX.prototype._inputIndex = function _inputIndex(hash, index) {
   return -1;
 };
 
-TX.prototype.addOutput = function addOutput(output) {
-  output = bcoin.output(output);
-
-  this.outputs.push(output);
-};
-
 TX.prototype.getSubscript = function getSubscript(index) {
   var script;