remove mutable arg from inputs/outputs.

lib/bcoin/input.js

@@ -184,7 +184,6 @@ Outpoint.prototype.inspect = function inspect() {
  * @exports Input
  * @constructor
  * @param {NakedInput} options
- * @param {Boolean?} mutable
  * @property {Outpoint} prevout - Outpoint.
  * @property {Script} script - Input script / scriptSig.
  * @property {Number} sequence - nSequence.
@@ -195,33 +194,30 @@ Outpoint.prototype.inspect = function inspect() {
  * @property {Boolean} mutable
  */
 
-function Input(options, mutable) {
+function Input(options) {
   if (!(this instanceof Input))
-    return new Input(options, mutable);
+    return new Input(options);
 
-  this.mutable = false;
   this.prevout = new Outpoint();
   this.script = new bcoin.script();
   this.sequence = 0xffffffff;
   this.witness = new bcoin.witness();
   this.coin = null;
+  this.mutable = false;
 
   if (options)
-    this.fromOptions(options, mutable);
+    this.fromOptions(options);
 }
 
 /**
  * Inject properties from options object.
  * @private
  * @param {Object} options
- * @param {Boolean} mutable
  */
 
-Input.prototype.fromOptions = function fromOptions(options, mutable) {
+Input.prototype.fromOptions = function fromOptions(options) {
   assert(options, 'Input data is required.');
 
-  this.mutable = !!mutable;
-
   if (options.prevout)
     this.prevout.fromOptions(options.prevout);
 

lib/bcoin/mtx.js

@@ -69,11 +69,11 @@ function MTX(options) {
   this.inputs = [];
   this.outputs = [];
   this.locktime = 0;
+
   this.ts = 0;
   this.block = null;
   this.index = -1;
   this.ps = options.ps != null ? options.ps : utils.now();
-  this.changeIndex = options.changeIndex != null ? options.changeIndex : -1;
   this.height = -1;
   this.mutable = true;
 
@@ -91,6 +91,8 @@ function MTX(options) {
   this._hashSequence = null;
   this._hashOutputs = null;
 
+  this.changeIndex = options.changeIndex != null ? options.changeIndex : -1;
+
   if (options.inputs) {
     for (i = 0; i < options.inputs.length; i++)
       this.addInput(options.inputs[i]);
@@ -158,7 +160,8 @@ MTX.prototype.addInput = function addInput(options, index) {
 
   assert(options.prevout);
 
-  input = new bcoin.input(options, true);
+  input = new bcoin.input(options);
+  input.mutable = true;
 
   this.inputs.push(input);
 
@@ -720,7 +723,8 @@ MTX.prototype.addOutput = function addOutput(address, value) {
     options = address;
   }
 
-  output = new bcoin.output(options, true);
+  output = new bcoin.output(options);
+  output.mutable = true;
 
   if (options.address)
     output.script = Script.fromAddress(options.address);

lib/bcoin/output.js

@@ -17,7 +17,6 @@ var assert = utils.assert;
  * @exports Output
  * @constructor
  * @param {NakedOutput} options
- * @param {Boolean?} mutable
  * @property {Amount} value - Value in satoshis.
  * @property {Script} script
  * @property {String} type - Script type.
@@ -25,31 +24,27 @@ var assert = utils.assert;
  * @property {Boolean} mutable
  */
 
-function Output(options, mutable) {
+function Output(options) {
   if (!(this instanceof Output))
-    return new Output(options, mutable);
+    return new Output(options);
 
-  this.mutable = false;
   this.value = 0;
   this.script = new bcoin.script();
+  this.mutable = false;
 
   if (options)
-    this.fromOptions(options, mutable);
+    this.fromOptions(options);
 }
 
 /**
  * Inject properties from options object.
  * @private
  * @param {NakedOutput} options
- * @param {Boolean} mutable
  */
 
-Output.prototype.fromOptions = function fromOptions(options, mutable) {
+Output.prototype.fromOptions = function fromOptions(options) {
   assert(options, 'Output data is required.');
   assert(!options.value || utils.isNumber(options.value));
-  assert(!mutable || options.value >= 0);
-
-  this.mutable = !!mutable;
 
   if (options.value)
     this.value = options.value;
@@ -63,12 +58,11 @@ Output.prototype.fromOptions = function fromOptions(options, mutable) {
 /**
  * Instantiate output from options object.
  * @param {NakedOutput} options
- * @param {Boolean} mutable
  * @returns {Output}
  */
 
-Output.fromOptions = function fromOptions(options, mutable) {
-  return new Output().fromOptions(options, mutable);
+Output.fromOptions = function fromOptions(options) {
+  return new Output().fromOptions(options);
 };
 
 /**