import { BeaconStateAllForks, CachedBeaconStateAllForks, EpochTransitionCache } from "../types.js";
/**
 * Update validator registry for validators that activate + exit
 * updateBalance is an optimization:
 * - For spec test, it's true
 * - For processEpoch flow, it's false, i.e to only update balances once in processRewardsAndPenalties()
 *
 * PERF: almost no (constant) cost.
 * - Total slashings by increment is computed once and stored in state.epochCtx.totalSlashingsByIncrement so no need to compute here
 * - Penalties for validators with the same effective balance are the same and computed once
 * - No need to apply penalties to validators here, do it once in processRewardsAndPenalties()
 * - indicesToSlash: max len is 8704. But it's very unlikely since it would require all validators on the same
 *   committees to sign slashable attestations.
 * - On normal mainnet conditions indicesToSlash = 0
 *
 * @returns slashing penalties to be applied in processRewardsAndPenalties()
 */
export declare function processSlashings(state: CachedBeaconStateAllForks, cache: EpochTransitionCache, updateBalance?: boolean): number[];
/**
 * Get total slashings by increment.
 * By default, total slashings are computed every time we run processSlashings() function above.
 * We improve it by computing it once and store it in state.epochCtx.totalSlashingsByIncrement
 * Every change to state.slashings should update totalSlashingsByIncrement.
 */
export declare function getTotalSlashingsByIncrement(state: BeaconStateAllForks): number;
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