/**
 * VaultKeyDerivation - Derives vault encryption keys from vault seed and master password
 *
 * Uses HKDF-SHA256 to derive a 32-byte AES-256 key from:
 * - IKM (Input Key Material): vault's BIP39 seed + master password
 * - Info: vault ID (for domain separation)
 *
 * Security: Each vault has its own independent BIP39 seed that can be
 * regenerated/cycled without affecting other vaults or the member's identity.
 *
 * Requirements:
 * - 5.1: Derives 32-byte AES-256 keys using HKDF-SHA256
 * - 5.2: Combines vault seed and master password as input key material
 * - 5.3: Uses vault ID as the info parameter for domain separation
 */
export declare class VaultKeyDerivation {
    /**
     * Derive a vault encryption key
     * @param vaultSeed - Vault's own BIP39 seed (64 bytes) - independent of member
     * @param masterPassword - User's master password
     * @param vaultId - Unique vault identifier (used for domain separation)
     * @returns 32-byte AES-256 key
     */
    static deriveVaultKey(vaultSeed: Uint8Array, masterPassword: string, vaultId: string): Uint8Array;
}
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