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common.js
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common.js
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const crypto = require('crypto')
module.exports = {
/**
* Generate a random value.
*
* @param {number} [size=16] - The length of the random value to generate.
* @returns {Promise<Buffer>} The random value.
*/
random: (size = 16) => {
return new Promise((resolve, reject) => {
let buffer = Buffer.alloc(size)
return crypto.randomFill(buffer, (err, result) => {
if (err !== null && err !== void 0) {
return reject(err)
} else {
return resolve(result)
}
})
})
},
/**
* Generate a random number between a range.
*
* @param {number} [low=1 - The starting range.
* @param {number} [high=100000] - The ending range.
* @returns {Promise<number>} The random number.
*/
randomNumber: (low = 1, high = 100000) => {
return new Promise((resolve, reject) => {
if (low >= high) {
reject(new Error('low number must be less than high number.'))
}
return resolve(Math.floor(Math.random() * (high - low + 1) + low))
})
},
/**
* Generate a UTC UNIX timestamp in seconds.
*
* @returns {Promise<number>} The UTC time as a UNIX timestamp.
*/
utcTimestamp: () => {
return new Promise((resolve, reject) => {
const now = new Date()
return resolve(Math.floor(
(now.getTime() + now.getTimezoneOffset() * (60 * 1000)) / 1000))
})
},
/**
* Get a Date object in the UTC timezone.
*
* @returns {Promise<Date>}
*/
utcDate: () => {
return new Promise((resolve, reject) => {
const now = new Date()
return resolve(
new Date(now.getTime() + (now.getTimezoneOffset() * 60000)))
})
}
}