30 lines
724 B
TypeScript
30 lines
724 B
TypeScript
// Copyright 2017-2020 @polkadot/util-crypto authors & contributors
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// SPDX-License-Identifier: Apache-2.0
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import BN from 'bn.js';
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import { hexToBn } from '@polkadot/util';
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import randomAsHex from './asHex';
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const BN_53 = new BN(0b11111111111111111111111111111111111111111111111111111);
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/**
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* @name randomAsNumber
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* @summary Creates a random number from random bytes.
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* @description
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* Returns a random number generated from the secure bytes.
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* @example
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* <BR>
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*
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* ```javascript
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* import { randomAsNumber } from '@polkadot/util-crypto';
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*
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* randomAsNumber(); // => <random number>
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* ```
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*/
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export default function randomAsNumber (): number {
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return hexToBn(
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randomAsHex(8)
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).and(BN_53).toNumber();
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}
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