| 1 | // Copyright 2017-2022 @polkadot/util-crypto authors & contributors
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| 2 | // SPDX-License-Identifier: Apache-2.0
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| 3 | import { hasBigInt } from '@polkadot/util';
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| 4 | import { bip39Generate, isReady } from '@polkadot/wasm-crypto';
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| 5 | import { generateMnemonic } from "./bip39.js";
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| 6 | // mapping of words to the actual strength (as expected)
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| 7 | const STRENGTH_MAP = {
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| 8 | 12: 16 * 8,
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| 9 | 15: 20 * 8,
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| 10 | 18: 24 * 8,
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| 11 | 21: 28 * 8,
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| 12 | 24: 32 * 8
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| 13 | };
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| 14 | /**
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| 15 | * @name mnemonicGenerate
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| 16 | * @summary Creates a valid mnemonic string using using [BIP39](https://github.com/bitcoin/bips/blob/master/bip-0039.mediawiki).
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| 17 | * @example
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| 18 | * <BR>
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| 19 | *
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| 20 | * ```javascript
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| 21 | * import { mnemonicGenerate } from '@polkadot/util-crypto';
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| 22 | *
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| 23 | * const mnemonic = mnemonicGenerate(); // => string
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| 24 | * ```
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| 25 | */
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| 26 |
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| 27 | export function mnemonicGenerate(numWords = 12, onlyJs) {
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| 28 | return !hasBigInt || !onlyJs && isReady() ? bip39Generate(numWords) : generateMnemonic(STRENGTH_MAP[numWords]);
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| 29 | } |
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