import { DocumentNode, GraphQLSchema, OperationTypeNode } from 'graphql';
import { Request, Response } from 'koa';
export interface GraphQLListener<Context> {
    onStart?: (ctx: {}) => Omit<GraphQLListener<Context>, 'onStart'> | void;
    onExecute?: (ctx: {
        context: Context;
        document: DocumentNode;
        operation: OperationTypeNode;
    }) => Omit<GraphQLListener<Context>, 'onStart' | 'onExecute'> | void;
    onResponse?: (ctx: {
        response: any;
        context: Context;
    }) => Omit<GraphQLListener<Context>, 'onStart' | 'onExecute' | 'onResponse'> | void;
    onShutdown?: (ctx: {
        response: any;
    }) => Omit<GraphQLListener<Context>, 'onStart' | 'onExecute' | 'onResponse' | 'onShutdown'> | void;
}
interface FactoryArgs<Context> {
    schema: GraphQLSchema;
    listeners: GraphQLListener<Context>[];
}
export type GraphQLQueryHandler<Context> = (args: {
    request: Request;
    response: Response;
    createContext: ({}: {
        operation: OperationTypeNode;
    }) => Context;
}) => any;
export declare const createGraphQLQueryHandler: <Context>({ schema, listeners, }: FactoryArgs<Context>) => GraphQLQueryHandler<Context>;
export declare const extractOriginalError: (e: Error) => Error;
export {};
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