Function deriveSecretKeyTreeRoot

packages/happy-app/sources/encryption/deriveKey.ts:8–14

(seed: Uint8Array, usage: string)

};

export async function deriveSecretKeyTreeRoot(seed: Uint8Array, usage: string): Promise<KeyTreeState> {
    const I = await hmac_sha512(new TextEncoder().encode(usage + ' Master Seed'), seed);
    return {
        key: I.slice(0, 32),
        chainCode: I.slice(32)
    };
}

export async function deriveSecretKeyTreeChild(chainCode: Uint8Array, index: string): Promise<KeyTreeState> {