import type { BlitTransport, BlitTransportData, BlitTransportOptions, ConnectionStatus } from "../types";
export interface WebTransportTransportOptions extends BlitTransportOptions {
    /**
     * SHA-256 hash of the server's TLS certificate (hex string).
     * Required for self-signed certs (e.g. auto-generated gateway certs).
     */
    serverCertificateHash?: string;
}
/**
 * BlitTransport implementation over WebTransport (QUIC/HTTP3).
 *
 * The protocol is length-prefixed binary frames on a single bidirectional
 * QUIC stream, with a 2-byte-length + passphrase auth handshake.
 */
export declare class WebTransportTransport implements BlitTransport {
    private wt;
    private writer;
    private _status;
    private reconnectTimer;
    private connectPromise;
    private currentDelay;
    private disposed;
    private messageListeners;
    private statusListeners;
    /** True when the server explicitly rejected the passphrase. */
    authRejected: boolean;
    /** Last error message, if any. */
    lastError: string | null;
    private readonly url;
    private readonly passphrase;
    private readonly _reconnect;
    private readonly initialDelay;
    private readonly maxDelay;
    private readonly backoff;
    private readonly connectTimeoutMs;
    private readonly certHash?;
    constructor(url: string, passphrase: string, options?: WebTransportTransportOptions);
    get status(): ConnectionStatus;
    send(data: Uint8Array): void;
    close(): void;
    suspend(): void;
    reconnect(): void;
    addEventListener(type: "message", listener: (data: BlitTransportData) => void): void;
    addEventListener(type: "statuschange", listener: (status: ConnectionStatus) => void): void;
    removeEventListener(type: "message", listener: (data: BlitTransportData) => void): void;
    removeEventListener(type: "statuschange", listener: (status: ConnectionStatus) => void): void;
    private setStatus;
    private clearReconnectTimer;
    private scheduleReconnect;
    private cleanup;
    connect(): void;
    private connectInternal;
    private readLoop;
}
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