132 lines
3.3 KiB
JavaScript
132 lines
3.3 KiB
JavaScript
'use strict';
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var assert = require('assert');
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var bitcore = require('bitcore-lib');
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var BufferReader = bitcore.encoding.BufferReader;
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function Encoding(servicePrefix) {
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this.servicePrefix = servicePrefix;
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this.nonP2PKPrefix = new Buffer('00', 'hex');
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this.P2PKPrefix = new Buffer('01', 'hex');
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}
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Encoding.prototype.encodeUtxoIndexKey = function(address, txid, outputIndex) {
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assert(address, 'address is required');
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var buffers = [this.servicePrefix, this.nonP2PKPrefix];
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var addressSizeBuffer = new Buffer(1);
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addressSizeBuffer.writeUInt8(address.length);
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var addressBuffer = new Buffer(address, 'utf8');
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buffers.push(addressSizeBuffer);
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buffers.push(addressBuffer);
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if (txid) {
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var txidBuffer = new Buffer(txid, 'hex');
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buffers.push(txidBuffer);
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}
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if (outputIndex >= 0) {
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var outputIndexBuffer = new Buffer(4);
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outputIndexBuffer.writeUInt32BE(outputIndex);
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buffers.push(outputIndexBuffer);
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}
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return Buffer.concat(buffers);
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};
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Encoding.prototype.decodeUtxoIndexKey = function(buffer) {
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var reader = new BufferReader(buffer);
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reader.read(3);
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var addressSize = reader.readUInt8();
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var address = reader.read(addressSize).toString('utf8');
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var txid = reader.read(32).toString('hex');
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var outputIndex = reader.readUInt32BE(4);
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return {
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address: address,
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txid: txid,
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outputIndex: outputIndex
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};
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};
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Encoding.prototype.encodeUtxoIndexValue = function(height, satoshis, scriptBuffer) {
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var heightBuffer = new Buffer(4);
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heightBuffer.writeUInt32BE(height);
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var satoshisBuffer = new Buffer(8);
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satoshisBuffer.writeDoubleBE(satoshis);
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return Buffer.concat([heightBuffer, satoshisBuffer, scriptBuffer]);
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};
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Encoding.prototype.decodeUtxoIndexValue = function(buffer) {
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var height = buffer.readUInt32BE();
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var satoshis = buffer.readDoubleBE(4);
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var scriptBuffer = buffer.slice(12);
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return {
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height: height,
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satoshis: satoshis,
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script: scriptBuffer
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};
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};
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Encoding.prototype.encodeP2PKUtxoIndexKey = function(txid, outputIndex) {
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assert(txid, 'txid is required');
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var buffers = [this.servicePrefix, this.P2PKPrefix];
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var txidBuffer = new Buffer(txid);
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buffers.push(txidBuffer);
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var outputIndexBuffer = new Buffer(4);
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outputIndexBuffer.writeUInt32BE(outputIndex);
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buffers.push(outputIndexBuffer);
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return Buffer.concat(buffers);
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};
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Encoding.prototype.decodeP2PKUtxoIndexKey = function(buffer) {
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var reader = new BufferReader(buffer);
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reader.read(3);
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var addressSize = reader.readUInt8();
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var address = reader.read(addressSize).toString('utf8');
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var txid = reader.read(32).toString('hex');
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var outputIndex = reader.readUInt32BE(4);
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return {
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address: address,
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txid: txid,
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outputIndex: outputIndex
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};
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};
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Encoding.prototype.encodeP2PKUtxoIndexValue = function(height, satoshis, scriptBuffer) {
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var heightBuffer = new Buffer(4);
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heightBuffer.writeUInt32BE(height);
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var satoshisBuffer = new Buffer(8);
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satoshisBuffer.writeDoubleBE(satoshis);
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return Buffer.concat([heightBuffer, satoshisBuffer, scriptBuffer]);
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};
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Encoding.prototype.decodeP2PKUtxoIndexValue = function(buffer) {
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var height = buffer.readUInt32BE();
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var satoshis = buffer.readDoubleBE(4);
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var scriptBuffer = buffer.slice(12);
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return {
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height: height,
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satoshis: satoshis,
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script: scriptBuffer
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};
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};
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module.exports = Encoding;
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