import { ApiPromise } from '@polkadot/api';
import { RuntimeVersion } from '@polkadot/types/interfaces';
import { SubstrateBlock } from '@subql/types';
import { ApiService } from '../api.service';
import { SpecVersion } from '../dictionary';
export declare const SPEC_VERSION_BLOCK_GAP = 100;
export declare abstract class BaseRuntimeService {
    protected apiService: ApiService;
    parentSpecVersion?: number;
    specVersionMap: SpecVersion[];
    private currentRuntimeVersion?;
    latestFinalizedHeight?: number;
    constructor(apiService: ApiService);
    specChanged(height: number, specVersion: number): Promise<boolean>;
    abstract getSpecVersion(blockHeight: number): Promise<{
        blockSpecVersion: number;
        syncedDictionary: boolean;
    }>;
    get api(): ApiPromise;
    getSpecFromMap(blockHeight: number, specVersions?: SpecVersion[]): number | undefined;
    getSpecFromApi(height: number): Promise<number>;
    prefetchMeta(height: number): Promise<void>;
    getRuntimeVersion(block: SubstrateBlock): Promise<RuntimeVersion>;
}