| 1 | // Copyright 2017-2023 @polkadot/util-crypto authors & contributors
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| 2 | // SPDX-License-Identifier: Apache-2.0
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| 3 |
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| 4 | import { compactAddLength, isU8a, stringToU8a, u8aConcat } from '@polkadot/util';
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| 5 | import { blake2AsU8a } from "../blake2/asU8a.js";
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| 6 | const HDKD = compactAddLength(stringToU8a('Ed25519HDKD'));
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| 7 | export function ed25519DeriveHard(seed, chainCode) {
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| 8 | if (!isU8a(chainCode) || chainCode.length !== 32) {
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| 9 | throw new Error('Invalid chainCode passed to derive');
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| 10 | }
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| 11 | return blake2AsU8a(u8aConcat(HDKD, seed, chainCode));
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| 12 | } |
| \ | No newline at end of file |