import { OnApplicationShutdown } from '@nestjs/common';
import { EventEmitter2 } from '@nestjs/event-emitter';
import { ApiPromise } from '@polkadot/api';
import { RuntimeVersion, Header } from '@polkadot/types/interfaces';
import { NodeConfig, ConnectionPoolService, ApiService as BaseApiService, IBlock } from '@subql/node-core';
import { IEndpointConfig } from '@subql/types-core';
import { SubqueryProject } from '../configure/SubqueryProject';
import { ApiPromiseConnection } from './apiPromise.connection';
import { ApiAt, BlockContent, LightBlockContent } from './types';
export declare class ApiService extends BaseApiService<ApiPromise, ApiAt, IBlock<BlockContent>[] | IBlock<LightBlockContent>[], ApiPromiseConnection, IEndpointConfig> implements OnApplicationShutdown {
    private project;
    private _fetchBlocksFunction?;
    private fetchBlocksBatches;
    private _currentBlockHash?;
    private _currentBlockNumber?;
    private nodeConfig;
    private constructor();
    private get fetchBlocksFunction();
    private get currentBlockHash();
    private set currentBlockHash(value);
    private get currentBlockNumber();
    private set currentBlockNumber(value);
    onApplicationShutdown(): Promise<void>;
    static init(project: SubqueryProject, connectionPoolService: ConnectionPoolService<ApiPromiseConnection>, eventEmitter: EventEmitter2, nodeConfig: NodeConfig): Promise<ApiService>;
    updateChainTypes(): Promise<void>;
    updateBlockFetching(): void;
    get api(): ApiPromise;
    getPatchedApi(header: Header, runtimeVersion?: RuntimeVersion): Promise<ApiAt>;
    private redecorateRpcFunction;
    private patchApiRpc;
    private getRPCFunctionName;
    fetchBlocks(heights: number[], overallSpecVer?: number, numAttempts?: number): Promise<IBlock<LightBlockContent>[] | IBlock<BlockContent>[]>;
    protected assertChainId(network: {
        chainId: string;
    }, connection: ApiPromiseConnection): void;
}