| 1 | export function createSeedDeriveFn(fromSeed, derive) {
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| 2 | return (keypair, { chainCode, isHard }) => {
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| 3 | if (!isHard) {
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| 4 | throw new Error('A soft key was found in the path and is not supported');
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| 5 | }
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| 6 | return fromSeed(derive(keypair.secretKey.subarray(0, 32), chainCode));
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| 7 | };
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| 8 | }
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