import { ChainTypes, SubstrateRuntimeHandler, SubstrateCustomHandler, SubstrateHandler } from '@subql/common-substrate';
import { Reader } from '@subql/types-core';
import { SubqueryProject } from '../configure/SubqueryProject';
export declare function isBaseHandler(handler: SubstrateHandler): handler is SubstrateRuntimeHandler;
export declare function isCustomHandler(handler: SubstrateHandler): handler is SubstrateCustomHandler;
export declare function getChainTypes(reader: Reader, root: string, file: string): Promise<ChainTypes>;
export declare function loadChainTypes(file: string, projectRoot: string): unknown;
export declare function loadChainTypesFromJs(filePath: string, requireRoot?: string): unknown;
export declare function isOnlyEventHandlers(project: SubqueryProject): boolean;