/** Group Audio Protocol client wrapper. */
import { PayloadCodec } from "./native";
import { MlsContext } from "./mls";
import { GroupNode, OutboundFrame } from "./node";
/** Outcome of {@link GapClient.accept}. */
export interface GapAcceptResult {
    status: "new" | "late" | "error" | string;
    source?: number;
    seq?: number;
    bytes?: number;
    reason?: string;
}
/**
 * Group Audio Protocol client.
 *
 * Maintains a per-source ``rtp_sequence`` window and validates
 * ``key_phase`` against the current group epoch.
 */
export declare class GapClient {
    /** Native handle (i32). */
    handle: number;
    private constructor();
    /** Create a fresh GAP client. */
    static create(): GapClient;
    /**
     * Send an Opus audio frame.
     * @param codec - payload encoding; use `PayloadCodec.FlatBuffers` for lowest latency.
     */
    send(node: GroupNode, mls: MlsContext, target: number, mediaSourceId: number, rtpTimestamp: bigint, opus: Buffer, codec?: PayloadCodec): OutboundFrame;
    /**
     * Accept a plaintext payload delivered by the GBP layer.
     * `codec` must match the `codec` field of the `payload_received` event.
     */
    accept(plaintext: Buffer, currentEpoch: bigint | number, codec?: PayloadCodec): GapAcceptResult;
    /** Clear the replay window. Intended for use after an epoch change. */
    reset(): void;
    /** Release the native handle. Idempotent. */
    close(): void;
    [Symbol.dispose](): void;
}
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