import { CallHandler, ExecutionContext, NestInterceptor } from '@nestjs/common';
import { ApmService } from './service/apm.service';
import { Observable } from 'rxjs';
export declare abstract class ApmInterceptorConstructor implements NestInterceptor {
    protected readonly apmService: ApmService;
    protected readonly mapFunction?: ((request: any) => UserContextKeys) | undefined;
    protected constructor(apmService: ApmService, mapFunction?: ((request: any) => UserContextKeys) | undefined);
    abstract intercept(context: ExecutionContext, next: CallHandler<any>): Observable<any> | Promise<Observable<any>>;
}
export interface UserContextKeys {
    id?: string | number;
    username?: string;
    email?: string;
}
export declare type ApmFunctionFilter<T = any> = (payload: T) => void;
export interface ApmClassFilter<T = any> {
    filter: ApmFunctionFilter<T>;
}
export declare type ApmFilter<T = any> = ApmClassFilter<T> | ApmFunctionFilter<T>;
export declare type ApmError = string | Error | {
    message: string;
    params: any[];
};
export interface ApmOptions {
    httpUserMapFunction?: (request: any) => UserContextKeys;
}
export interface ApmAsyncOptions {
    useFactory?: (...args: any[]) => Promise<ApmOptions> | ApmOptions;
    inject?: any;
}