import { EventEmitter } from 'stream';
export declare class NewReliNestjsEvent {
    private readonly eventEmitter;
    constructor(eventEmitter: EventEmitter);
    on(event: 'transactionStartFailed', listener: (transactionId: string, error: unknown) => void): void;
    on(event: 'transactionFinished', listener: (transactionId: string) => void): void;
    on(event: 'transactionFinishFailed', listener: (transactionId: string, error: unknown) => void): void;
    on(event: 'transactionStarted', listener: (transactionId: string) => void): void;
}