import { ForkSeq } from "@lodestar/params";
import { Attestation, Slot, phase0 } from "@lodestar/types";
import { CachedBeaconStateAllForks, CachedBeaconStatePhase0 } from "../types.js";
/**
 * Process an Attestation operation. Validates an attestation and appends it to state.currentEpochAttestations or
 * state.previousEpochAttestations to be processed in bulk at the epoch transition.
 *
 * PERF: Work depends on number of Attestation per block. On mainnet the average is 89.7 / block, with 87.8 participant
 * true bits on average. See `packages/state-transition/test/perf/analyzeBlocks.ts`
 */
export declare function processAttestationPhase0(state: CachedBeaconStatePhase0, attestation: phase0.Attestation, verifySignature?: boolean): void;
export declare function validateAttestation(fork: ForkSeq, state: CachedBeaconStateAllForks, attestation: Attestation): void;
export declare function isTimelyTarget(fork: ForkSeq, inclusionDistance: Slot): boolean;
export declare function checkpointToStr(checkpoint: phase0.Checkpoint): string;
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