import type { NostrEvent, ReqFilter } from "./nostr";
import type { FlatReqFilter } from "./query-optimizer";
/**
 * Request router managed splitting of requests to one or more relays, and which relay to send events to.
 */
export interface RequestRouter {
    /**
     * Pick relays to send an event to
     * @param pk The pubkey you are replying to
     * @param system Nostr system interface
     * @param pickN Number of relays to pick per recipient
     * @returns
     */
    forReplyTo(pk: string, pickN?: number): Promise<Array<string>>;
    /**
     * Pick relays to send an event to
     * @param ev The reply event to send
     * @param system Nostr system interface
     * @param pickN Number of relays to pick per recipient
     * @returns
     */
    forReply(ev: NostrEvent, pickN?: number): Promise<Array<string>>;
    /**
     * Split a request filter to one or more relays.
     * @param filter Filter to split
     * @param pickN Number of relays to pick
     * @returns
     */
    forRequest(filter: ReqFilter, pickN?: number): Array<ReqFilter>;
    /**
     * Split a request filter to one or more relays.
     * @param filter Filters to split
     * @param pickN Number of relays to pick
     * @returns
     */
    forFlatRequest(filter: Array<FlatReqFilter>, pickN?: number): Array<FlatReqFilter>;
    /**
     * Same as forRequest, but merges the results
     * @param filters
     */
    forAllRequest(filters: Array<ReqFilter>): Array<ReqFilter>;
}
export declare abstract class BaseRequestRouter implements RequestRouter {
    abstract forReplyTo(pk: string, pickN?: number): Promise<Array<string>>;
    abstract forReply(ev: NostrEvent, pickN?: number): Promise<Array<string>>;
    abstract forRequest(filter: ReqFilter, pickN?: number): Array<ReqFilter>;
    abstract forFlatRequest(filter: FlatReqFilter[], pickN?: number): Array<FlatReqFilter>;
    forAllRequest(filters: Array<ReqFilter>): ReqFilter[];
}
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