import { GraphQLResolveInfo } from "graphql";
declare type HighResolutionTime = [number, number];
declare const traceHRStartTime: unique symbol;
declare const traceWallStartTime: unique symbol;
export declare const apolloTracingContext: unique symbol;
export interface ApolloTracingContext {
    [traceHRStartTime]: HighResolutionTime;
    [traceWallStartTime]: Date;
    version: 1;
    startTime: string;
    endTime: string;
    duration: number;
    execution: {
        parsing?: {
            startOffset: number;
            duration: number;
        };
        validation?: {
            startOffset: number;
            duration: number;
        };
        resolvers: ApolloTracingResolverStats[];
    };
}
export interface ApolloTracingResolverStats {
    path: (string | number)[];
    parentType: string;
    fieldName: string;
    returnType: string;
    startOffset: number;
    duration: number;
}
export declare function apolloTracingGraphQLMiddleware(resolve: Function, parent: any, args: any, context: {
    [apolloTracingContext]: ApolloTracingContext;
}, info: GraphQLResolveInfo): Promise<any>;
export declare function startTracingContext(): ApolloTracingContext;
export declare function endTracingContext(context: ApolloTracingContext): void;
export {};