import { EventEmitter } from "node:events";
import { StrictEventEmitter } from "strict-event-emitter-types";
import { Slot } from "@lodestar/types";
import { HeadEventData } from "./chainHeaderTracker.js";
export declare enum ValidatorEvent {
    /**
     * This event signals that the node chain has a new head.
     */
    chainHead = "chainHead",
    /**
     * This event signals that an execution payload and blobs are available for payload attestation.
     */
    executionPayloadAvailable = "executionPayloadAvailable"
}
export type ExecutionPayloadAvailableEventData = {
    slot: Slot;
    blockRoot: string;
};
export type ValidatorEvents = {
    [ValidatorEvent.chainHead]: (head: HeadEventData) => void;
    [ValidatorEvent.executionPayloadAvailable]: (payload: ExecutionPayloadAvailableEventData) => void;
};
declare const ValidatorEventEmitter_base: new () => StrictEventEmitter<EventEmitter<[never]>, ValidatorEvents>;
/**
 * Emit important validator events.
 */
export declare class ValidatorEventEmitter extends ValidatorEventEmitter_base {
    /**
     * Wait for the first block to come with slot >= provided slot.
     */
    waitForBlockSlot(slot: Slot): Promise<void>;
}
export {};
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