import { CompositeViewDU } from "@chainsafe/ssz";
import { phase0, ssz } from "@lodestar/types";
import { BeaconStateAllForks, CachedBeaconStateAllForks } from "../types.js";
/**
 * Store vote counts for every eth-execution block that has votes; if any eth-execution block wins majority support within a 1024-slot
 * voting period, formally accept that eth-execution block and set it as the official "latest known eth-execution block" in the eth-consensus state.
 *
 * PERF: Processing cost depends on the current amount of votes.
 * - Best case: Vote is already decided, zero work. See becomesNewEth1Data conditions
 * - Worst case: 1023 votes and no majority vote yet.
 */
export declare function processEth1Data(state: CachedBeaconStateAllForks, eth1Data: phase0.Eth1Data): void;
/**
 * Returns true if adding the given `eth1Data` to `state.eth1DataVotes` would
 * result in a change to `state.eth1Data`.
 */
export declare function becomesNewEth1Data(state: BeaconStateAllForks, newEth1Data: CompositeViewDU<typeof ssz.phase0.Eth1Data>): boolean;
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