/** Group Signaling Protocol client wrapper. */
import { PayloadCodec } from "./native";
import { MlsContext } from "./mls";
import { GroupNode, OutboundFrame } from "./node";
/** Signal opcode registry. */
export declare enum SignalType {
    Join = 100,
    Leave = 101,
    RoleChange = 102,
    Mute = 200,
    Unmute = 201,
    StreamStart = 300,
    StreamStop = 301,
    CodecUpdate = 400
}
/** Outcome of {@link GspClient.accept}. */
export interface GspAcceptResult {
    status: "new" | "error" | string;
    signal?: string;
    signalCode?: SignalType;
    sender?: number;
    roleClaim?: number;
    requestId?: number;
    reason?: string;
}
/**
 * Group Signaling Protocol client.
 *
 * Tracks ``request_id`` deduplication and exposes accepted signals to the
 * application.
 */
export declare class GspClient {
    /** Native handle (i32). */
    handle: number;
    private constructor();
    /** Create a fresh GSP client. */
    static create(): GspClient;
    /**
     * Send a signal without signal-specific args.
     * @param codec - payload encoding (default: CBOR).
     */
    send(node: GroupNode, mls: MlsContext, target: number, signal: SignalType, roleClaim: number, requestId: number, codec?: PayloadCodec): OutboundFrame;
    /**
     * Send a signal with opcode-specific args bytes.
     * @param codec - payload encoding (default: CBOR).
     */
    sendWithArgs(node: GroupNode, mls: MlsContext, target: number, signal: SignalType, roleClaim: number, requestId: number, args: Buffer, codec?: PayloadCodec): OutboundFrame;
    /**
     * Accept a plaintext payload delivered by the GBP layer.
     * `currentEpoch` lets the client auto-reset its dedup state when the
     * epoch advances. `codec` must match the `codec` field of the
     * `payload_received` event.
     */
    accept(plaintext: Buffer, currentEpoch: bigint | number, codec?: PayloadCodec): GspAcceptResult;
    /** Clear the request-id deduplication set. Intended for use after an epoch change. */
    reset(): void;
    /** Release the native handle. Idempotent. */
    close(): void;
    [Symbol.dispose](): void;
}
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