import { GossipSub, GossipSubComponents, GossipsubOpts } from "@chainsafe/libp2p-gossipsub";
import type { PeerIdStr, TopicStr } from "@chainsafe/libp2p-gossipsub/types";
import { Callback, CreateNodeOptions, IAsyncIterator, IDecodedMessage, IDecoder, IEncoder, IMessage, IRelay, type IRoutingInfo, Libp2p, LightPushSDKResult, PubsubTopic } from "@waku/interfaces";
export type Observer<T extends IDecodedMessage> = {
    decoder: IDecoder<T>;
    callback: Callback<T>;
};
export type RelayCreateOptions = CreateNodeOptions & {
    routingInfos: IRoutingInfo[];
} & Partial<GossipsubOpts>;
export type ContentTopic = string;
type ActiveSubscriptions = Map<PubsubTopic, ContentTopic[]>;
type RelayConstructorParams = {
    libp2p: Libp2p;
    pubsubTopics: PubsubTopic[];
};
/**
 * Implements the [Waku v2 Relay protocol](https://rfc.vac.dev/spec/11/).
 * Throws if libp2p.pubsub does not support Waku Relay
 */
export declare class Relay implements IRelay {
    pubsubTopics: Set<PubsubTopic>;
    private defaultDecoder;
    static multicodec: string;
    readonly gossipSub: GossipSub;
    /**
     * observers called when receiving new message.
     * Observers under key `""` are always called.
     */
    private observers;
    constructor(params: RelayConstructorParams);
    /**
     * Mounts the gossipsub protocol onto the libp2p node
     * and subscribes to all the topics.
     *
     * @override
     * @returns {void}
     */
    start(): Promise<void>;
    /**
     * Wait for at least one peer with the given protocol to be connected and in the gossipsub
     * mesh for all pubsubTopics.
     */
    waitForPeers(): Promise<void>;
    /**
     * Send Waku message.
     */
    send(encoder: IEncoder, message: IMessage): Promise<LightPushSDKResult>;
    subscribeWithUnsubscribe<T extends IDecodedMessage>(decoders: IDecoder<T> | IDecoder<T>[], callback: Callback<T>): () => void;
    subscribe: <T extends IDecodedMessage>(decoders: IDecoder<T> | IDecoder<T>[], callback: Callback<T>) => () => void;
    private removeObservers;
    toSubscriptionIterator<T extends IDecodedMessage>(decoders: IDecoder<T> | IDecoder<T>[]): Promise<IAsyncIterator<T>>;
    getActiveSubscriptions(): ActiveSubscriptions;
    getMeshPeers(topic?: TopicStr): PeerIdStr[];
    private subscribeToAllTopics;
    private processIncomingMessage;
    /**
     * Subscribe to a pubsub topic and start emitting Waku messages to observers.
     *
     * @override
     */
    private gossipSubSubscribe;
    private isRelayPubsub;
}
export declare function wakuGossipSub(init?: Partial<RelayCreateOptions>): (components: GossipSubComponents) => GossipSub;
export {};