import { SignerPayloadJSON } from '@dedot/types';
import { SignedExtension } from '../SignedExtension.js';
/**
 * @description Nonce check and increment to give replay protection for transactions.
 */
export declare class CheckNonce extends SignedExtension<number> {
    #private;
    init(): Promise<void>;
    fromPayload(payload: SignerPayloadJSON): Promise<void>;
    toPayload(): Partial<SignerPayloadJSON>;
}