export declare const NET_PACKET_COOKIE_REQUEST = 24;
export declare const NET_PACKET_COOKIE_RESPONSE = 25;
export declare const NET_PACKET_CRYPTO_HS = 26;
export declare const NET_PACKET_CRYPTO_DATA = 27;
export type CookieRequest = {
    senderDhtPublicKey: Uint8Array;
    senderRealPublicKey: Uint8Array;
    echo: bigint;
};
export type CookieResponse = {
    cookie: Uint8Array;
    echo: bigint;
};
export type CryptoHandshake = {
    recipientCookie: Uint8Array;
    baseNonce: Uint8Array;
    sessionPublicKey: Uint8Array;
    cookieHash: Uint8Array;
    embeddedCookie: Uint8Array;
    senderRealPublicKey: Uint8Array;
    senderDhtPublicKey: Uint8Array;
};
export declare function createCookieRequest(opts: {
    senderRealPublicKey: Uint8Array;
    senderDhtPublicKey: Uint8Array;
    senderDhtSecretKey: Uint8Array;
    receiverDhtPublicKey: Uint8Array;
    echo: bigint;
}): Uint8Array;
export declare function openCookieRequest(packet: Uint8Array, opts: {
    receiverDhtSecretKey: Uint8Array;
}): CookieRequest | undefined;
export declare function createCookieResponse(opts: {
    request: CookieRequest;
    receiverDhtSecretKey: Uint8Array;
    receiverCookieSymmetricKey: Uint8Array;
}): Uint8Array;
export declare function openCookieResponse(packet: Uint8Array, opts: {
    receiverDhtPublicKey: Uint8Array;
    senderDhtSecretKey: Uint8Array;
}): CookieResponse | undefined;
export declare function openCookie(cookie: Uint8Array, opts: {
    symmetricKey: Uint8Array;
}): {
    timestamp: bigint;
    realPublicKey: Uint8Array;
    dhtPublicKey: Uint8Array;
} | undefined;
export declare function createCryptoHandshake(opts: {
    recipientCookie: Uint8Array;
    baseNonce: Uint8Array;
    sessionPublicKey: Uint8Array;
    senderRealSecretKey: Uint8Array;
    senderRealPublicKey: Uint8Array;
    senderDhtPublicKey: Uint8Array;
    receiverRealPublicKey: Uint8Array;
    /**
     * Peer's DHT public key. Falls back to receiverRealPublicKey when omitted
     * (Carrier C SDK uses the same key for real and DHT identity).
     */
    receiverDhtPublicKey?: Uint8Array;
    localCookieSymmetricKey: Uint8Array;
}): Uint8Array;
export declare function openCryptoHandshake(packet: Uint8Array, opts: {
    receiverRealSecretKey: Uint8Array;
    receiverCookieSymmetricKey: Uint8Array;
}): CryptoHandshake | undefined;
export declare function createCryptoDataPacket(opts: {
    sessionSharedKey: Uint8Array;
    sentNonce: Uint8Array;
    bufferStart: number;
    packetNumber: number;
    payload: Uint8Array;
}): Uint8Array;
export declare function openCryptoDataPacket(packet: Uint8Array, opts: {
    sessionSharedKey: Uint8Array;
    recvBaseNonce: Uint8Array;
}): {
    payload: Uint8Array;
    bufferStart: number;
    packetNumber: number;
    nonceLast2: number;
    /** The exact nonce this packet decrypted with. The caller must track
     *  recvBaseNonce = usedNonce (+1 for the next expected) — NOT overwrite
     *  just the low two bytes, which loses the carry into byte 21. */
    usedNonce: Uint8Array;
} | undefined;
export declare function incrementNonce(nonce: Uint8Array): void;