import type { GoFeatureFlagProviderOptions } from '../go-feature-flag-provider-options';
import type { ExporterMetadata, ExportEvent, FlagConfigResponse } from '../model';
import type { Logger } from '@openfeature/server-sdk';
/**
 * GOFeatureFlagApi is a class that provides methods to interact with the GO Feature Flag API.
 */
export declare class GoFeatureFlagApi {
    private readonly endpoint;
    private readonly timeout;
    private readonly apiKey?;
    private readonly fetchImplementation;
    private readonly logger?;
    /**
     * Constructor for GoFeatureFlagApi.
     * @param options Options provided during the initialization of the provider
     * @throws Error when options are not provided
     */
    constructor(options: GoFeatureFlagProviderOptions, logger?: Logger);
    /**
     * RetrieveFlagConfiguration is a method that retrieves the flag configuration from the GO Feature Flag API.
     * @param etag If provided, we call the API with "If-None-Match" header.
     * @param flags List of flags to retrieve, if not set or empty, we will retrieve all available flags.
     * @returns A FlagConfigResponse returning the success data.
     * @throws FlagConfigurationEndpointNotFoundException if the endpoint is not reachable.
     * @throws ImpossibleToRetrieveConfigurationException if the endpoint is returning an error.
     */
    retrieveFlagConfiguration(etag?: string, flags?: string[]): Promise<FlagConfigResponse>;
    /**
     * Sends a list of events to the GO Feature Flag data collector.
     * @param eventsList List of events
     * @param exporterMetadata Metadata associated.
     * @throws UnauthorizedException when we are not authorized to call the API
     * @throws ImpossibleToSendDataToTheCollectorException when an error occurred when calling the API
     */
    sendEventToDataCollector(eventsList: ExportEvent[], exporterMetadata: ExporterMetadata): Promise<void>;
    /**
     * HandleFlagConfigurationSuccess is handling the success response of the flag configuration request.
     * @param response HTTP response.
     * @param body String of the body.
     * @returns A FlagConfigResponse object.
     */
    private handleFlagConfigurationSuccess;
}