import { ForkSeq } from "@lodestar/params";
import { altair } from "@lodestar/types";
import { EffectiveBalanceIncrements } from "../cache/effectiveBalanceIncrements.js";
import { BeaconStateAllForks } from "../types.js";
/**
 * Return the sync committee for a given state and epoch.
 *
 * SLOW CODE - 🐢
 */
export declare function getNextSyncCommittee(fork: ForkSeq, state: BeaconStateAllForks, activeValidatorIndices: Uint32Array, effectiveBalanceIncrements: EffectiveBalanceIncrements): {
    indices: Uint32Array;
    syncCommittee: altair.SyncCommittee;
};
/**
 * Same logic in https://github.com/ethereum/eth2.0-specs/blob/v1.1.0-alpha.5/specs/altair/beacon-chain.md#sync-committee-processing
 */
export declare function computeSyncParticipantReward(totalActiveBalanceIncrements: number): number;
/**
 * Before we manage bigIntSqrt(totalActiveStake) as BigInt and return BigInt.
 * bigIntSqrt(totalActiveStake) should fit a number (2 ** 53 -1 max)
 **/
export declare function computeBaseRewardPerIncrement(totalActiveStakeByIncrement: number): number;
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