import { type Libp2pFlatSqlSyncBackendOptions, type Libp2pFlatSqlSyncClient } from './sdn-backend-libp2p-sync';
import type { FlatSqlPublishedShard, FlatSqlPublishedShardBatch, FlatSqlSyncChunk, FlatSqlSyncManifest, FlatSqlSyncQuery, FlatSqlWireSpeedProbeQuery, FlatSqlWireSpeedProbeResult } from '../../flatsql-sync';
import type { SdnBackend } from './sdn-backend';
type Libp2pFlatSqlSyncClientFactory = (options: Libp2pFlatSqlSyncBackendOptions) => Promise<Libp2pFlatSqlSyncClient>;
export declare class Libp2pFlatSqlSyncBackendCache {
    private readonly clientFactory;
    private readonly clientPromises;
    private readonly publishedShardClientPools;
    private readonly publishedShardClientIndexes;
    private readonly publishedShardSourceStats;
    private readonly backends;
    constructor(clientFactory?: Libp2pFlatSqlSyncClientFactory);
    backendFor(options: Libp2pFlatSqlSyncBackendOptions): SdnBackend;
    readFlatSqlSyncChunk(options: Libp2pFlatSqlSyncBackendOptions, query: FlatSqlSyncQuery): Promise<FlatSqlSyncChunk>;
    openFlatSqlSyncManifest(options: Libp2pFlatSqlSyncBackendOptions, query: FlatSqlSyncQuery): Promise<FlatSqlSyncManifest>;
    readFlatSqlPublishedShard(options: Libp2pFlatSqlSyncBackendOptions, query: FlatSqlSyncQuery & {
        cid: string;
    }): Promise<FlatSqlPublishedShard>;
    readFlatSqlPublishedShardFromSources(sources: Libp2pFlatSqlSyncBackendOptions[], query: FlatSqlSyncQuery & {
        cid: string;
    }, preferredSourceIndex?: number): Promise<FlatSqlPublishedShard>;
    readFlatSqlPublishedShardBatch(options: Libp2pFlatSqlSyncBackendOptions, query: FlatSqlSyncQuery & {
        cids: string[];
    }): Promise<FlatSqlPublishedShardBatch>;
    readFlatSqlPublishedShardBatchFromSources(sources: Libp2pFlatSqlSyncBackendOptions[], query: FlatSqlSyncQuery & {
        cids: string[];
    }, preferredSourceIndex?: number): Promise<FlatSqlPublishedShardBatch>;
    measureWireSpeed(options: Libp2pFlatSqlSyncBackendOptions, query: Omit<FlatSqlWireSpeedProbeQuery, 'targetPeerId' | 'candidateAddrs'>): Promise<FlatSqlWireSpeedProbeResult>;
    releaseControlClient(options: Libp2pFlatSqlSyncBackendOptions): Promise<void>;
    destroy(): Promise<void>;
    private clientFor;
    private publishedShardClientFor;
}
export {};
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