1 | 'use strict';
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2 |
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3 | var _ = require('lodash');
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4 | var BN = require('../crypto/bn');
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5 | var buffer = require('buffer');
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6 | var bufferUtil = require('../util/buffer');
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7 | var JSUtil = require('../util/js');
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8 | var BufferWriter = require('../encoding/bufferwriter');
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9 | var Script = require('../script');
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10 | var $ = require('../util/preconditions');
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11 | var errors = require('../errors');
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12 |
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13 | var MAX_SAFE_INTEGER = 0x1fffffffffffff;
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14 |
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15 | function Output(args) {
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16 | if (!(this instanceof Output)) {
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17 | return new Output(args);
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18 | }
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19 | if (_.isObject(args)) {
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20 | this.satoshis = args.satoshis;
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21 | if (bufferUtil.isBuffer(args.script)) {
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22 | this._scriptBuffer = args.script;
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23 | } else {
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24 | var script;
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25 | if (_.isString(args.script) && JSUtil.isHexa(args.script)) {
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26 | script = Buffer.from(args.script, 'hex');
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27 | } else {
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28 | script = args.script;
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29 | }
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30 | this.setScript(script);
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31 | }
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32 | } else {
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33 | throw new TypeError('Unrecognized argument for Output');
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34 | }
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35 | }
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36 |
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37 | Object.defineProperty(Output.prototype, 'script', {
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38 | configurable: false,
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39 | enumerable: true,
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40 | get: function() {
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41 | if (this._script) {
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42 | return this._script;
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43 | } else {
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44 | this.setScriptFromBuffer(this._scriptBuffer);
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45 | return this._script;
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46 | }
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47 |
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48 | }
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49 | });
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50 |
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51 | Object.defineProperty(Output.prototype, 'satoshis', {
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52 | configurable: false,
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53 | enumerable: true,
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54 | get: function() {
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55 | return this._satoshis;
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56 | },
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57 | set: function(num) {
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58 | if (num instanceof BN) {
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59 | this._satoshisBN = num;
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60 | this._satoshis = num.toNumber();
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61 | } else if (_.isString(num)) {
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62 | this._satoshis = parseInt(num);
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63 | this._satoshisBN = BN.fromNumber(this._satoshis);
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64 | } else {
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65 | $.checkArgument(
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66 | JSUtil.isNaturalNumber(num),
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67 | 'Output satoshis is not a natural number'
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68 | );
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69 | this._satoshisBN = BN.fromNumber(num);
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70 | this._satoshis = num;
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71 | }
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72 | $.checkState(
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73 | JSUtil.isNaturalNumber(this._satoshis),
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74 | 'Output satoshis is not a natural number'
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75 | );
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76 | }
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77 | });
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78 |
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79 | Output.prototype.invalidSatoshis = function() {
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80 | if (this._satoshis > MAX_SAFE_INTEGER) {
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81 | return 'transaction txout satoshis greater than max safe integer';
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82 | }
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83 | if (this._satoshis !== this._satoshisBN.toNumber()) {
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84 | return 'transaction txout satoshis has corrupted value';
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85 | }
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86 | if (this._satoshis < 0) {
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87 | return 'transaction txout negative';
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88 | }
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89 | return false;
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90 | };
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91 |
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92 | Output.prototype.toObject = Output.prototype.toJSON = function toObject() {
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93 | var obj = {
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94 | satoshis: this.satoshis
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95 | };
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96 | obj.script = this._scriptBuffer.toString('hex');
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97 | return obj;
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98 | };
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99 |
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100 | Output.fromObject = function(data) {
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101 | return new Output(data);
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102 | };
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103 |
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104 | Output.prototype.setScriptFromBuffer = function(buffer) {
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105 | this._scriptBuffer = buffer;
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106 | try {
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107 | this._script = Script.fromBuffer(this._scriptBuffer);
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108 | this._script._isOutput = true;
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109 | } catch(e) {
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110 | if (e instanceof errors.Script.InvalidBuffer) {
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111 | this._script = null;
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112 | } else {
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113 | throw e;
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114 | }
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115 | }
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116 | };
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117 |
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118 | Output.prototype.setScript = function(script) {
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119 | if (script instanceof Script) {
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120 | this._scriptBuffer = script.toBuffer();
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121 | this._script = script;
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122 | this._script._isOutput = true;
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123 | } else if (_.isString(script)) {
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124 | this._script = Script.fromString(script);
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125 | this._scriptBuffer = this._script.toBuffer();
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126 | this._script._isOutput = true;
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127 | } else if (bufferUtil.isBuffer(script)) {
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128 | this.setScriptFromBuffer(script);
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129 | } else {
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130 | throw new TypeError('Invalid argument type: script');
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131 | }
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132 | return this;
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133 | };
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134 |
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135 | Output.prototype.inspect = function() {
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136 | var scriptStr;
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137 | if (this.script) {
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138 | scriptStr = this.script.inspect();
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139 | } else {
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140 | scriptStr = this._scriptBuffer.toString('hex');
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141 | }
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142 | return '<Output (' + this.satoshis + ' sats) ' + scriptStr + '>';
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143 | };
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144 |
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145 | Output.fromBufferReader = function(br) {
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146 | var obj = {};
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147 | obj.satoshis = br.readUInt64LEBN();
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148 | var size = br.readVarintNum();
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149 | if (size !== 0) {
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150 | obj.script = br.read(size);
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151 | } else {
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152 | obj.script = Buffer.from([]);
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153 | }
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154 | return new Output(obj);
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155 | };
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156 |
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157 | Output.prototype.toBufferWriter = function(writer) {
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158 | if (!writer) {
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159 | writer = new BufferWriter();
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160 | }
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161 | writer.writeUInt64LEBN(this._satoshisBN);
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162 | var script = this._scriptBuffer;
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163 | writer.writeVarintNum(script.length);
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164 | writer.write(script);
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165 | return writer;
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166 | };
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167 |
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168 | module.exports = Output;
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