import { Gwei, ValidatorIndex } from "@lodestar/types";
import { EffectiveBalanceIncrements } from "../cache/effectiveBalanceIncrements.js";
import { BeaconStateAllForks } from "../index.js";
import { CachedBeaconStateAllForks } from "../types.js";
/**
 * Return the combined effective balance of the [[indices]].
 * `EFFECTIVE_BALANCE_INCREMENT` Gwei minimum to avoid divisions by zero.
 *
 * SLOW CODE - 🐢
 */
export declare function getTotalBalance(state: BeaconStateAllForks, indices: ValidatorIndex[]): Gwei;
/**
 * Increase the balance for a validator with the given ``index`` by ``delta``.
 */
export declare function increaseBalance(state: BeaconStateAllForks, index: ValidatorIndex, delta: number): void;
/**
 * Decrease the balance for a validator with the given ``index`` by ``delta``.
 *
 * Set to ``0`` when underflow.
 */
export declare function decreaseBalance(state: BeaconStateAllForks, index: ValidatorIndex, delta: number): void;
/**
 * This method is used to get justified balances from a justified state.
 * This is consumed by forkchoice which based on delta so we return "by increment" (in ether) value,
 * ie [30, 31, 32] instead of [30e9, 31e9, 32e9]
 */
export declare function getEffectiveBalanceIncrementsZeroInactive(justifiedState: CachedBeaconStateAllForks): EffectiveBalanceIncrements;
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