import { AxiosResponse } from 'axios';
import { ResourceType } from '../../enums/Resource';
import { RettiwtConfig } from '../../models/RettiwtConfig';
import { IFetchArgs } from '../../types/args/FetchArgs';
import { IPostArgs } from '../../types/args/PostArgs';
/**
 * The base service that handles all HTTP requests.
 *
 * @public
 */
export declare class FetcherService {
    /** The AuthService instance to use. */
    private readonly _auth;
    /** The delay/delay function to use (ms). */
    private readonly _delay?;
    /** The service used to handle HTTP and API errors */
    private readonly _errorHandler;
    /** The max wait time for a response. */
    private readonly _timeout;
    /** The config object. */
    protected readonly config: RettiwtConfig;
    /**
     * @param config - The config object for configuring the Rettiwt instance.
     */
    constructor(config: RettiwtConfig);
    /**
     * Checks the authorization status based on the requested resource.
     *
     * @param resource - The requested resource.
     *
     * @throws An error if not authorized to access the requested resource.
     */
    private _checkAuthorization;
    /**
     * Returns the AuthCredentials based on the type of key present.
     *
     * @returns The generated AuthCredential
     */
    private _getCredential;
    /**
     * Generates the header for the transaction ID.
     *
     * @param method - The target method.
     * @param url - The target URL.
     *
     * @returns The header containing the transaction ID.
     */
    private _getTransactionHeader;
    private _handleXMigration;
    /**
     * Validates the given args against the given resource.
     *
     * @param resource - The resource against which validation is to be done.
     * @param args - The args to be validated.
     *
     * @returns The validated args.
     */
    private _validateArgs;
    /**
     * Introduces a delay using the configured delay/delay function.
     */
    private _wait;
    /**
     * Makes an HTTP request according to the given parameters.
     *
     * @param resource - The requested resource.
     * @param args - The args to be used for the request.
     *
     * @typeParam T - The type of the returned response data.
     *
     * @returns The raw Axios response.
     *
     * @example
     *
     * #### Fetching the raw details of a single user, using their username
     * ```ts
     * import { FetcherService, ResourceType } from 'rettiwt-api';
     *
     * // Creating a new FetcherService instance using the given 'API_KEY'
     * const fetcher = new FetcherService({ apiKey: API_KEY });
     *
     * // Fetching the details of the User with username 'user1'
     * fetcher.request(ResourceType.USER_DETAILS_BY_USERNAME, { id: 'user1' })
     * .then(res => {
     * 	console.log(res);
     * })
     * .catch(err => {
     * 	console.log(err);
     * });
     * ```
     */
    request<T = unknown>(resource: ResourceType, args: IFetchArgs | IPostArgs): Promise<AxiosResponse<T>>;
}