107 lines
1.9 KiB
JavaScript
107 lines
1.9 KiB
JavaScript
/*!
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* util.js - utils for bcoin
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* Copyright (c) 2014-2015, Fedor Indutny (MIT License)
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* Copyright (c) 2014-2017, Christopher Jeffrey (MIT License).
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* https://github.com/bcoin-org/bcoin
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*/
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'use strict';
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const assert = require('assert');
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/**
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* @exports utils/util
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*/
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const util = exports;
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/**
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* Return hrtime (shim for browser).
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* @param {Array} time
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* @returns {Array} [seconds, nanoseconds]
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*/
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util.hrtime = function hrtime(time) {
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if (!process.hrtime) {
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const now = Date.now();
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if (time) {
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const [hi, lo] = time;
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const start = hi * 1000 + lo / 1e6;
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return now - start;
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}
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const ms = now % 1000;
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// Seconds
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const hi = (now - ms) / 1000;
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// Nanoseconds
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const lo = ms * 1e6;
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return [hi, lo];
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}
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if (time) {
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const [hi, lo] = process.hrtime(time);
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return hi * 1000 + lo / 1e6;
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}
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return process.hrtime();
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};
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/**
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* Get current time in unix time (seconds).
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* @returns {Number}
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*/
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util.now = function now() {
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return Math.floor(Date.now() / 1000);
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};
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/**
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* Create a Date ISO string from time in unix time (seconds).
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* @param {Number?} time - Seconds in unix time.
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* @returns {String}
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*/
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util.date = function date(time) {
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if (time == null)
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time = util.now();
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return new Date(time * 1000).toISOString().slice(0, -5) + 'Z';
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};
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/**
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* Get unix seconds from a Date string.
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* @param {String?} date - Date ISO String.
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* @returns {Number}
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*/
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util.time = function time(date) {
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if (date == null)
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return util.now();
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return new Date(date) / 1000 | 0;
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};
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/**
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* Reverse a hex-string (used because of
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* bitcoind's affinity for uint256le).
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* @param {String} data - Hex string.
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* @returns {String} Reversed hex string.
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*/
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util.revHex = function revHex(data) {
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assert(typeof data === 'string');
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assert(data.length > 0);
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assert(data.length % 2 === 0);
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let out = '';
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for (let i = 0; i < data.length; i += 2)
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out = data.slice(i, i + 2) + out;
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return out;
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};
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