103 lines
2.6 KiB
JavaScript
103 lines
2.6 KiB
JavaScript
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'use strict';
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var _ = require('lodash');
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var BufferWriter = require('../encoding/bufferwriter');
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var buffer = require('buffer');
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var bufferUtil = require('../util/buffer');
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var jsUtil = require('../util/js');
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var Script = require('../script');
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function Input(params) {
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if (!(this instanceof Input)) {
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return new Input(params);
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}
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if (params) {
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return this._fromObject(params);
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}
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}
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Object.defineProperty(Input.prototype, 'script', {
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configurable: false,
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writeable: false,
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get: function() {
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if (!this._script) {
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this._script = new Script(this._scriptBuffer);
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}
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return this._script;
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}
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});
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Input.prototype._fromObject = function(params) {
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if (_.isString(params.prevTxId) && jsUtil.isHexa(params.prevTxId)) {
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params.prevTxId = new buffer.Buffer(params.prevTxId, 'hex');
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}
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this.prevTxId = params.prevTxId;
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this.outputIndex = params.outputIndex;
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this.sequenceNumber = params.sequenceNumber;
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if (params.script || params.scriptBuffer) {
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this.setScript(params.script || params.scriptBuffer);
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}
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return this;
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};
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Input.prototype.toJSON = function() {
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return {
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prevTxId: this.prevTxId,
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outputIndex: this.outputIndex,
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sequenceNumber: this.sequenceNumber,
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script: this._scriptBuffer.toString('hex')
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};
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};
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Input.fromJSON = function(json) {
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return new Input({
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prevTxId: json.prevTxId || json.txidbuf,
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outputIndex: json.outputIndex || json.txoutnum,
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sequenceNumber: json.sequenceNumber || json.seqnum,
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scriptBuffer: new Script(json.script, 'hex')
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});
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};
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Input.fromBufferReader = function(br) {
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var input = new Input();
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input.prevTxId = br.readReverse(32);
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input.outputIndex = br.readUInt32LE();
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var scriptSize = br.readVarintNum();
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if (scriptSize) {
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input._scriptBuffer = br.read(scriptSize);
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} else {
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input._scriptBuffer = new buffer.Buffer([]);
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}
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input.sequenceNumber = br.readUInt32LE();
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return input;
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};
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Input.prototype.toBufferWriter = function(writer) {
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if (!writer) {
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writer = new BufferWriter();
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}
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writer.writeReverse(this.prevTxId);
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writer.writeUInt32LE(this.outputIndex);
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var script = this._scriptBuffer;
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writer.writeVarintNum(script.length);
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writer.write(script);
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writer.writeUInt32LE(this.sequenceNumber);
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return writer;
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};
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Input.prototype.setScript = function(script) {
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if (script instanceof Script) {
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this._script = script;
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this._scriptBuffer = script.toBuffer();
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} else if (bufferUtil.isBuffer(script)) {
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this._script = null;
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this._scriptBuffer = new buffer.Buffer(script);
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} else {
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console.log(script);
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throw new TypeError('Invalid Argument');
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}
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return this;
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};
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module.exports = Input;
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