import { type PublicSignKey } from "@peerbit/crypto";
import type * as types from "@peerbit/document-interface";
export declare const idAgnosticQueryKey: (query: types.SearchRequest | types.SearchRequestIndexed | types.IterationRequest) => string;
export interface QueryPredictor {
    onRequest: (request: types.SearchRequest | types.SearchRequestIndexed | types.IterationRequest, ctx: {
        from: PublicSignKey;
    }) => {
        ignore: boolean;
    };
    predictedQuery: (from: PublicSignKey) => types.SearchRequest | types.SearchRequestIndexed | types.IterationRequest | undefined;
}
/**
 * Learns the most common recent queries and predicts the most frequent one.
 * If we just pre-empted a peer with some query, the *first* matching request
 * that arrives from that peer within `ignoreWindow` ms is ignored.
 */
export default class MostCommonQueryPredictor implements QueryPredictor {
    private readonly threshold;
    private readonly ttl;
    private readonly ignoreWindow;
    private readonly queries;
    /**
     * predicted:
     * requestKey  →  Map<peerHash, timestamp>
     */
    private readonly predicted;
    constructor(threshold: number, ttl?: number, // 10 min
    ignoreWindow?: number);
    private cleanupQueries;
    private cleanupPredictions;
    onRequest(request: types.SearchRequest | types.SearchRequestIndexed, { from }: {
        from: PublicSignKey;
    }): {
        ignore: boolean;
    };
    predictedQuery(from: PublicSignKey): types.SearchRequest | types.SearchRequestIndexed | undefined;
}
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