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/**
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* Generate secure URL-friendly unique ID. The non-blocking version.
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*
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* By default, the ID will have 21 symbols to have a collision probability
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* similar to UUID v4.
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*
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* ```js
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* import { nanoid } from 'nanoid/async'
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* nanoid().then(id => {
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* model.id = id
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* })
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* ```
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*
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* @param size Size of the ID. The default size is 21.
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* @returns A promise with a random string.
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*/
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export function nanoid(size?: number): Promise<string>
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/**
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* A low-level function.
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* Generate secure unique ID with custom alphabet. The non-blocking version.
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*
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* Alphabet must contain 256 symbols or less. Otherwise, the generator
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* will not be secure.
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*
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* @param alphabet Alphabet used to generate the ID.
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* @param defaultSize Size of the ID. The default size is 21.
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* @returns A function that returns a promise with a random string.
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*
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* ```js
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* import { customAlphabet } from 'nanoid/async'
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* const nanoid = customAlphabet('0123456789абвгдеё', 5)
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* nanoid().then(id => {
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* model.id = id //=> "8ё56а"
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* })
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* ```
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*/
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export function customAlphabet(
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alphabet: string,
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defaultSize?: number
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): (size?: number) => Promise<string>
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/**
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* Generate an array of random bytes collected from hardware noise.
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*
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* ```js
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* import { random } from 'nanoid/async'
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* random(5).then(bytes => {
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* bytes //=> [10, 67, 212, 67, 89]
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* })
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* ```
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*
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* @param bytes Size of the array.
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* @returns A promise with a random bytes array.
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*/
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export function random(bytes: number): Promise<Uint8Array>
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