import { ChainForkConfig } from "@lodestar/config";
import { Epoch, Root, TimeSeconds } from "@lodestar/types";
import { BeaconStateAllForks, CachedBeaconStateAllForks } from "../types.js";
import { StateBytesMetadata } from "./sszBytes.js";
export declare const ETH_TO_GWEI: number;
/**
 * Returns the epoch of the latest weak subjectivity checkpoint for the given
  `state` and `safetyDecay`. The default `safetyDecay` used should be 10% (= 0.1)
 */
export declare function getLatestWeakSubjectivityCheckpointEpoch(config: ChainForkConfig, state: CachedBeaconStateAllForks): Epoch;
/**
  Returns the weak subjectivity period for the current `state`.
    This computation takes into account the effect of:
      - validator set churn (bounded by `get_validator_churn_limit()` per epoch), and
      - validator balance top-ups (bounded by `MAX_DEPOSITS * SLOTS_PER_EPOCH` per epoch).
    A detailed calculation can be found at:
    https://github.com/runtimeverification/beacon-chain-verification/blob/master/weak-subjectivity/weak-subjectivity-analysis.pdf
 */
export declare function computeWeakSubjectivityPeriodCachedState(config: ChainForkConfig, state: CachedBeaconStateAllForks): number;
/**
 * Same to computeWeakSubjectivityPeriodCachedState but for normal state
 */
export declare function computeWeakSubjectivityPeriod(config: ChainForkConfig, state: BeaconStateAllForks): number;
export declare function computeWeakSubjectivityPeriodFromConstituentsPhase0(activeValidatorCount: number, totalBalanceByIncrement: number, churnLimit: number, minWithdrawabilityDelay: number): number;
export declare function computeWeakSubjectivityPeriodFromConstituentsElectra(totalBalanceByIncrement: number, balanceChurnLimit: number, minWithdrawabilityDelay: number): number;
export declare function computeWeakSubjectivityPeriodFromConstituentsGloas(totalBalanceByIncrement: number, exitChurnLimit: number, activationChurnLimit: number, consolidationChurnLimit: number, minWithdrawabilityDelay: number): number;
export declare function getLatestBlockRoot(state: BeaconStateAllForks): Root;
export type WeakSubjectivitySummary = {
    checkpointEpoch: Epoch;
    genesisTime: number;
    period: number;
};
/** The metadata must describe the supplied state bytes. */
export declare function computeWeakSubjectivitySummaryFromStateBytes(config: ChainForkConfig, bytes: Uint8Array, metadata: StateBytesMetadata): WeakSubjectivitySummary | null;
export declare function isWithinWeakSubjectivityPeriodFromSummary(config: ChainForkConfig, summary: WeakSubjectivitySummary, now?: TimeSeconds): boolean;
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