104 lines
2.8 KiB
JavaScript
104 lines
2.8 KiB
JavaScript
'use strict';
|
|
|
|
var bitcore = require('bitcore-lib');
|
|
var BufferReader = bitcore.encoding.BufferReader;
|
|
|
|
function Encoding(servicePrefix) {
|
|
this.servicePrefix = servicePrefix;
|
|
}
|
|
|
|
Encoding.prototype.encodeAddressIndexKey = function(address, height, txid) {
|
|
var prefix = new Buffer('00', 'hex');
|
|
var buffers = [this.servicePrefix, prefix];
|
|
|
|
var addressSizeBuffer = new Buffer(1);
|
|
addressSizeBuffer.writeUInt8(address.length);
|
|
var addressBuffer = new Buffer(address, 'utf8');
|
|
|
|
buffers.push(addressSizeBuffer);
|
|
buffers.push(addressBuffer);
|
|
|
|
var heightBuffer = new Buffer(4);
|
|
heightBuffer.writeUInt32BE(height || 0);
|
|
buffers.push(heightBuffer);
|
|
|
|
var txidBuffer = new Buffer(txid || Array(65).join('0'), 'hex');
|
|
buffers.push(txidBuffer);
|
|
|
|
return Buffer.concat(buffers);
|
|
};
|
|
|
|
Encoding.prototype.decodeAddressIndexKey = function(buffer) {
|
|
var reader = new BufferReader(buffer);
|
|
reader.read(3);
|
|
|
|
var addressSize = reader.readUInt8();
|
|
var address = reader.read(addressSize).toString('utf8');
|
|
var height = reader.readUInt32BE();
|
|
var txid = reader.read(32).toString('hex');
|
|
return {
|
|
address: address,
|
|
height: height,
|
|
txid: txid,
|
|
};
|
|
};
|
|
|
|
Encoding.prototype.encodeUtxoIndexKey = function(address, txid, outputIndex) {
|
|
var prefix = new Buffer('01', 'hex');
|
|
var buffers = [this.servicePrefix, prefix];
|
|
|
|
var addressSizeBuffer = new Buffer(1);
|
|
addressSizeBuffer.writeUInt8(address.length);
|
|
var addressBuffer = new Buffer(address, 'utf8');
|
|
|
|
buffers.push(addressSizeBuffer);
|
|
buffers.push(addressBuffer);
|
|
|
|
var txidBuffer = new Buffer(txid || new Array(65).join('0'), 'hex');
|
|
buffers.push(txidBuffer);
|
|
|
|
var outputIndexBuffer = new Buffer(4);
|
|
outputIndexBuffer.writeUInt32BE(outputIndex || 0);
|
|
buffers.push(outputIndexBuffer);
|
|
|
|
return Buffer.concat(buffers);
|
|
};
|
|
|
|
Encoding.prototype.decodeUtxoIndexKey = function(buffer) {
|
|
var reader = new BufferReader(buffer);
|
|
reader.read(3);
|
|
|
|
var addressSize = reader.readUInt8();
|
|
var address = reader.read(addressSize).toString('utf8');
|
|
var txid = reader.read(32).toString('hex');
|
|
var outputIndex = reader.readUInt32BE(4);
|
|
|
|
return {
|
|
address: address,
|
|
txid: txid,
|
|
outputIndex: outputIndex
|
|
};
|
|
};
|
|
|
|
Encoding.prototype.encodeUtxoIndexValue = function(height, satoshis, scriptBuffer) {
|
|
var heightBuffer = new Buffer(4);
|
|
heightBuffer.writeUInt32BE(height);
|
|
var satoshisBuffer = new Buffer(8);
|
|
satoshisBuffer.writeDoubleBE(satoshis);
|
|
return Buffer.concat([heightBuffer, satoshisBuffer, scriptBuffer]);
|
|
};
|
|
|
|
Encoding.prototype.decodeUtxoIndexValue = function(buffer) {
|
|
var height = buffer.readUInt32BE();
|
|
var satoshis = buffer.readDoubleBE(4);
|
|
var scriptBuffer = buffer.slice(12);
|
|
return {
|
|
height: height,
|
|
satoshis: satoshis,
|
|
script: scriptBuffer
|
|
};
|
|
};
|
|
|
|
module.exports = Encoding;
|
|
|