59 lines
1.7 KiB
JavaScript
59 lines
1.7 KiB
JavaScript
'use strict';
|
|
|
|
var Tx = require('bcoin').tx;
|
|
|
|
function Encoding(servicePrefix) {
|
|
this.servicePrefix = servicePrefix;
|
|
}
|
|
|
|
Encoding.prototype.encodeTransactionKey = function(txid) {
|
|
return Buffer.concat([this.servicePrefix, new Buffer(txid, 'hex')]);
|
|
};
|
|
|
|
Encoding.prototype.decodeTransactionKey = function(buffer) {
|
|
return buffer.slice(2).toString('hex');
|
|
};
|
|
|
|
// TODO: maybe we should be storing the block hash here too.
|
|
Encoding.prototype.encodeTransactionValue = function(transaction) {
|
|
var heightBuffer = new Buffer(4);
|
|
heightBuffer.writeUInt32BE(transaction.__height);
|
|
|
|
var timestampBuffer = new Buffer(4);
|
|
timestampBuffer.writeUInt32BE(transaction.__timestamp);
|
|
|
|
var inputValues = transaction.__inputValues;
|
|
var inputValuesBuffer = new Buffer(8 * inputValues.length);
|
|
for(var i = 0; i < inputValues.length; i++) {
|
|
inputValuesBuffer.writeDoubleBE(inputValues[i], i * 8);
|
|
}
|
|
|
|
var inputValuesLengthBuffer = new Buffer(2);
|
|
inputValuesLengthBuffer.writeUInt16BE(inputValues.length);
|
|
|
|
return new Buffer.concat([heightBuffer, timestampBuffer,
|
|
inputValuesLengthBuffer, inputValuesBuffer, transaction.toRaw()]);
|
|
};
|
|
|
|
Encoding.prototype.decodeTransactionValue = function(buffer) {
|
|
var height = buffer.readUInt32BE();
|
|
var timestamp = buffer.readUInt32BE(4);
|
|
|
|
var inputValuesLength = buffer.readUInt16BE(8);
|
|
var inputValues = [];
|
|
for(var i = 0; i < inputValuesLength; i++) {
|
|
inputValues.push(buffer.readDoubleBE(i * 8 + 10));
|
|
}
|
|
|
|
var txBuf = buffer.slice(inputValues.length * 8 + 10);
|
|
var transaction = Tx.fromRaw(txBuf);
|
|
|
|
transaction.__height = height;
|
|
transaction.__inputValues = inputValues;
|
|
transaction.__timestamp = timestamp;
|
|
return transaction;
|
|
};
|
|
|
|
module.exports = Encoding;
|
|
|