56 lines
1.6 KiB
JavaScript
56 lines
1.6 KiB
JavaScript
'use strict';
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var tx = require('bcoin').tx;
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function Encoding(servicePrefix) {
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this.servicePrefix = servicePrefix;
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}
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Encoding.prototype.encodeTransactionKey = function(txid) {
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return Buffer.concat([this.servicePrefix, new Buffer(txid, 'hex')]);
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};
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Encoding.prototype.decodeTransactionKey = function(buffer) {
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return buffer.slice(2).toString('hex');
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};
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Encoding.prototype.encodeTransactionValue = function(transaction) {
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var heightBuffer = new Buffer(4);
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heightBuffer.writeUInt32BE(transaction.__height);
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var timestampBuffer = new Buffer(8);
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timestampBuffer.writeDoubleBE(transaction.__timestamp);
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var inputValues = transaction.__inputValues;
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var inputValuesBuffer = new Buffer(8 * inputValues.length);
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for(var i = 0; i < inputValues.length; i++) {
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inputValuesBuffer.writeDoubleBE(inputValues[i], i * 8);
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}
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var inputValuesLengthBuffer = new Buffer(2);
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inputValuesLengthBuffer.writeUInt16BE(inputValues.length);
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return new Buffer.concat([heightBuffer, timestampBuffer,
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inputValuesLengthBuffer, inputValuesBuffer, transaction.toBuffer()]);
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};
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Encoding.prototype.decodeTransactionValue = function(buffer) {
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var height = buffer.readUInt32BE();
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var timestamp = buffer.readDoubleBE(4);
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var inputValuesLength = buffer.readUInt16BE(12);
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var inputValues = [];
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for(var i = 0; i < inputValuesLength; i++) {
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inputValues.push(buffer.readDoubleBE(i * 8 + 14));
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}
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var transaction = tx.fromRaw(buffer.slice(inputValues.length * 8 + 14));
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transaction.__height = height;
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transaction.__inputValues = inputValues;
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transaction.__timestamp = timestamp;
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return transaction;
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};
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module.exports = Encoding;
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