@polkadot/util-crypto/xxhash/asU8a.js

A collection of useful crypto utilities for @polkadot

import { hasBigInt, u8aToU8a } from '@polkadot/util';
import { isReady, twox } from '@polkadot/wasm-crypto';
import { createAsHex } from '../helpers.js';
import { xxhash64 } from './xxhash64.js';
/**
 * @name xxhashAsU8a
 * @summary Creates a xxhash64 u8a from the input.
 * @description
 * From either a `string`, `Uint8Array` or a `Buffer` input, create the xxhash64 and return the result as a `Uint8Array` with the specified `bitLength`.
 * @example
 * <BR>
 *
 * ```javascript
 * import { xxhashAsU8a } from '@polkadot/util-crypto';
 *
 * xxhashAsU8a('abc'); // => 0x44bc2cf5ad770999
 * ```
 */
export function xxhashAsU8a(data, bitLength = 64, onlyJs) {
    const rounds = Math.ceil(bitLength / 64);
    const u8a = u8aToU8a(data);
    if (!hasBigInt || (!onlyJs && isReady())) {
        return twox(u8a, rounds);
    }
    const result = new Uint8Array(rounds * 8);
    for (let seed = 0; seed < rounds; seed++) {
        result.set(xxhash64(u8a, seed).reverse(), seed * 8);
    }
    return result;
}
/**
 * @name xxhashAsHex
 * @description Creates a xxhash64 hex from the input.
 */
export const xxhashAsHex = /*#__PURE__*/ createAsHex(xxhashAsU8a);