import type { TransactionObservabilityManager } from '@lokalise/node-core';
import type { IFastifyMetrics } from 'fastify-metrics';
/**
 * TransactionObservabilityManager implementation that uses Prometheus counter
 * to track the number of started, failed and success transactions.
 */
export declare class PrometheusCounterTransactionManager<CustomLabels extends string = never> implements TransactionObservabilityManager {
    private readonly metricName;
    private readonly metricDescription;
    private readonly supportedCustomLabels;
    private readonly counter?;
    private readonly transactionNameByKey;
    private readonly customLabelsByKey;
    constructor(metricName: string, metricDescription: string, appMetrics?: IFastifyMetrics, customLabels?: Array<CustomLabels>);
    start(transactionName: string, uniqueTransactionKey: string): void;
    startWithGroup(transactionName: string, uniqueTransactionKey: string, _transactionGroup: string): void;
    stop(uniqueTransactionKey: string, wasSuccessful?: boolean): void;
    /**
     * Prometheus labels are the way Prometheus handles custom attributes
     * Note that it will skip any attributes that were not included in the constructor param "customLabels"
     */
    addCustomAttributes(uniqueTransactionKey: string, atts: {
        [p: string]: string | number | boolean;
    }): void;
    private registerMetric;
}