/**
 * Noise Protocol Implementation for TOSS
 * Per Section 5: "Transport reliability is explicitly not trusted.
 * All security guarantees enforced at the cryptographic layer."
 *
 * GAP #4 FIX: Full Noise Protocol session lifecycle
 */
/**
 * Noise session state
 */
export interface NoiseSession {
    peerId: string;
    sessionKey: Uint8Array;
    encryptionCipher: any;
    decryptionCipher: any;
    createdAt: number;
    expiresAt: number;
    initiator: boolean;
}
/**
 * Initialize Noise secure session with a static key.
 * @deprecated Use performNoiseHandshake instead
 */
export declare function initNoiseSession(staticKey: Uint8Array): (components: import("@chainsafe/libp2p-noise").NoiseComponents) => import("@libp2p/interface").ConnectionEncrypter<import("@chainsafe/libp2p-noise").NoiseExtensions>;
/**
 * GAP #4 FIX: Generate static keypair for long-term identity
 */
export declare function generateNoiseStaticKey(): {
    publicKey: Uint8Array;
    secretKey: Uint8Array;
};
/**
 * GAP #4 FIX: Perform Noise Protocol handshake
 * Implements NN (no-pre-shared-knowledge) pattern for TOSS
 */
/**
 * Perform Noise Protocol handshake between two peers
 * Establishes encrypted session for device-to-device communication
 *
 * Security: Uses X25519 ECDH for key agreement, ChaCha20-Poly1305 for AEAD
 */
export declare function performNoiseHandshake(peerId: string, peerStaticKey: Uint8Array, _localStaticKey: Uint8Array, _localSecretKey: Uint8Array, initiator: boolean): Promise<NoiseSession>;
/**
 * GAP #4 FIX: Encrypt message with Noise session
 */
export declare function noiseEncrypt(session: NoiseSession, plaintext: Uint8Array): Promise<Uint8Array>;
/**
 * GAP #4 FIX: Decrypt message with Noise session
 */
export declare function noiseDecrypt(session: NoiseSession, ciphertext: Uint8Array): Promise<Uint8Array>;
/**
 * GAP #4 FIX: Get active session or return null
 */
export declare function getNoiseSession(peerId: string): NoiseSession | null;
/**
 * GAP #4 FIX: Rotate session key for forward secrecy
 */
export declare function rotateNoiseSessionKey(session: NoiseSession): Promise<void>;
/**
 * GAP #4 FIX: Cleanup expired sessions
 */
export declare function cleanupExpiredNoiseSessions(): number;
/**
 * GAP #4 FIX: Get all active sessions
 */
export declare function getActiveNoiseSessions(): NoiseSession[];
//# sourceMappingURL=noise.d.ts.map