import { ApiClient } from "@lodestar/api";
import { ChainForkConfig } from "@lodestar/config";
import { IClock } from "@lodestar/state-transition";
import { Metrics } from "../metrics.js";
import { PubkeyHex } from "../types.js";
import { LoggerVc } from "../util/index.js";
import { ChainHeaderTracker } from "./chainHeaderTracker.js";
import { ValidatorEventEmitter } from "./emitter.js";
import { SyncingStatusTracker } from "./syncingStatusTracker.js";
import { ValidatorStore } from "./validatorStore.js";
export type SyncCommitteeServiceOpts = {
    scAfterBlockDelaySlotFraction?: number;
    distributedAggregationSelection?: boolean;
};
/**
 * Service that sets up and handles validator sync duties.
 */
export declare class SyncCommitteeService {
    private readonly config;
    private readonly logger;
    private readonly api;
    private readonly clock;
    private readonly validatorStore;
    private readonly emitter;
    private readonly chainHeaderTracker;
    readonly syncingStatusTracker: SyncingStatusTracker;
    private readonly metrics;
    private readonly opts?;
    private readonly dutiesService;
    constructor(config: ChainForkConfig, logger: LoggerVc, api: ApiClient, clock: IClock, validatorStore: ValidatorStore, emitter: ValidatorEventEmitter, chainHeaderTracker: ChainHeaderTracker, syncingStatusTracker: SyncingStatusTracker, metrics: Metrics | null, opts?: SyncCommitteeServiceOpts | undefined);
    removeDutiesForKey(pubkey: PubkeyHex): void;
    private runSyncCommitteeTasks;
    /**
     * Performs the first step of the attesting process: downloading `SyncCommittee` objects,
     * signing them and returning them to the validator.
     *
     * https://github.com/ethereum/consensus-specs/blob/v1.1.10/specs/altair/validator.md#sync-committee-messages
     *
     * Only one `SyncCommittee` is downloaded from the BN. It is then signed by each
     * validator and the list of individually-signed `SyncCommittee` objects is returned to the BN.
     */
    private produceAndPublishSyncCommittees;
    private getHeadForSyncCommitteeMessage;
    /**
     * Performs the second step of the attesting process: downloading an aggregated `SyncCommittee`,
     * converting it into a `SignedAggregateAndProof` and returning it to the BN.
     *
     * https://github.com/ethereum/consensus-specs/blob/v1.1.10/specs/altair/validator.md#sync-committee-contributions
     *
     * Only one aggregated `SyncCommittee` is downloaded from the BN. It is then signed
     * by each validator and the list of individually-signed `SignedAggregateAndProof` objects is
     * returned to the BN.
     */
    private produceAndPublishAggregates;
}
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