import { type X25519Keypair } from "./crypto.js";
export interface SessionKeys {
    /** Cipher state for sending (ChaCha20-Poly1305). First 32 bytes = key. */
    tx: Uint8Array;
    /** Cipher state for receiving (ChaCha20-Poly1305). First 32 bytes = key. */
    rx: Uint8Array;
    /** 6-emoji safety number derived from the handshake hash. */
    safetyNumber: string;
    /** Raw 32-byte SHA-256 handshake hash, usable for further derivation. */
    handshakeHash: Buffer;
    /**
     * Curve25519 static public key received from the initiator (app).
     * Extracted from state.rs before destroy() — use for peer identity validation.
     */
    remoteStaticKey?: Uint8Array;
}
/**
 * Runs Noise_XX_25519_ChaChaPoly_SHA256 as **responder** (the Mac side).
 * Pattern: receive msg1 (→e), send msg2 (←e,ee,s,es), receive msg3 (→s,se)
 * @param prologue Optional prologue bytes mixed into handshake hash (default: empty).
 */
export declare function runHandshakeResponder(localStatic: X25519Keypair, sendFn: (msg: Buffer) => Promise<void>, recvFn: () => Promise<Buffer>, prologue?: Uint8Array): Promise<SessionKeys>;
/**
 * Runs Noise_XX_25519_ChaChaPoly_SHA256 as **initiator** (the mobile side).
 * Exported for use in tests — production initiator is the app (Dart).
 * @param prologue Optional prologue bytes mixed into handshake hash (default: empty).
 */
export declare function runHandshakeInitiator(localStatic: X25519Keypair, sendFn: (msg: Buffer) => Promise<void>, recvFn: () => Promise<Buffer>, prologue?: Uint8Array): Promise<SessionKeys>;