import { ForkSeq } from "@lodestar/params";
import { CachedBeaconStateFulu, EpochTransitionCache } from "../types.js";
/**
 * This function updates the `proposer_lookahead` field in the beacon state
 * by shifting out proposer indices from the earliest epoch and appending new
 * proposer indices for the latest epoch. With `MIN_SEED_LOOKAHEAD` set to `1`,
 * this means that at the start of epoch `N`, the proposer lookahead for epoch
 * `N+1` will be computed and included in the beacon state's lookahead.
 */
export declare function processProposerLookahead(fork: ForkSeq, state: CachedBeaconStateFulu, cache: EpochTransitionCache): void;
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