import { BlockchainService } from '@unilogin/contracts';
import { ReferenceCountedState } from './ReferenceCountedState';
export declare class BlockNumberState extends ReferenceCountedState<number> {
    private readonly blockchainService;
    constructor(blockchainService: BlockchainService);
    bindedSet: (v: number) => void;
    onFirstSubscribe(): void;
    onLastUnsubscribe(): void;
}
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