/// <reference types="node" />
import { Event } from '../../event';
import { Meter } from '../../metrics';
import { BlockHeader } from '../../primitives';
import { HeadValue } from '../walletdb/headValue';
export declare class ScanState {
    hash: Buffer | null;
    sequence: number | null;
    readonly start: HeadValue;
    readonly end: HeadValue;
    readonly startedAt: number;
    readonly abortController: AbortController;
    readonly onTransaction: Event<[sequence: number, endSequence: number, action: "connect" | "disconnect"]>;
    readonly speed: Meter;
    private runningPromise;
    private runningResolve;
    constructor(start: HeadValue, end: HeadValue);
    get isAborted(): boolean;
    get estimate(): number;
    signal(header: BlockHeader, action: 'connect' | 'disconnect'): void;
    signalComplete(): void;
    abort(): Promise<void>;
    wait(): Promise<void>;
}
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