import { IAuthenticationManager } from "./utils/IAuthenticationManager.js";
import { AuthenticationManagerBase } from "./AuthenticationManagerBase.js";
/**
 * Options for the `ApiKey` constructor.
 */
export interface IApiKeyOptions {
    key: string;
    username?: string;
    portal?: string;
}
/**
 * Used to authenticate methods in ArcGIS REST JS with an API keys. The instance of `ApiKeyManager` can be passed to  {@linkcode IRequestOptions.authentication} to authenticate requests.
 *
 * ```js
 * import { ApiKeyManager } from '@esri/arcgis-rest-request';
 
 * const apiKey = new ApiKeyManager.fromKey("...");
 * ```
 *
 * In most cases however the API key can be passed directly to the {@linkcode IRequestOptions.authentication}.
 */
export declare class ApiKeyManager extends AuthenticationManagerBase implements IAuthenticationManager {
    /**
     * The current portal the user is authenticated with.
     */
    readonly portal: string;
    /**
     * The original API Key used to create this instance.
     */
    private readonly key;
    /**
     * The preferred method for creating an instance of `ApiKeyManager`.
     */
    static fromKey(apiKey: string | IApiKeyOptions): ApiKeyManager;
    constructor(options: IApiKeyOptions);
    /**
     * Gets the current access token (the API Key).
     */
    get token(): string;
    /**
     * Gets the current access token (the API Key).
     */
    getToken(url: string): Promise<string>;
    /**
     * Converts the `ApiKeyManager` instance to a JSON object. This is called when the instance is serialized to JSON with [`JSON.stringify()`](https://developer.mozilla.org/en-US/docs/Web/JavaScript/Reference/Global_Objects/JSON/stringify).
     *
     * ```js
     * import { ApiKeyManager } from '@esri/arcgis-rest-request';
     *
     * const apiKey = new ApiKeyManager.fromKey("...")
     *
     * const json = JSON.stringify(session);
     * ```
     *
     * @returns A plain object representation of the instance.
     */
    toJSON(): {
        type: string;
        token: string;
        username: string;
        portal: string;
    };
    /**
     * Serializes the ApiKeyManager instance to a JSON string.
     *
     * ```js
     * import { ApiKeyManager } from '@esri/arcgis-rest-request';
     *
     * const apiKey = new ApiKeyManager.fromKey("...")
     *
     * localStorage.setItem("apiKey", apiKey.serialize());
     * ```
     * @returns {string} The serialized JSON string.
     */
    serialize(): string;
    /**
     * Deserializes a JSON string previously created with {@linkcode ApiKeyManager.deserialize} to an {@linkcode ApiKeyManager} instance.
     *
     * ```js
     * import { ApiKeyManager } from '@esri/arcgis-rest-request';
     *
     * const apiKey = ApiKeyManager.deserialize(localStorage.getItem("apiKey"));
     * ```
     * @param {string} serialized - The serialized JSON string.
     * @returns {ApiKeyManager} The deserialized ApiKeyManager instance.
     */
    static deserialize(serialized: string): ApiKeyManager;
}
/**
 * @deprecated - Use {@linkcode ApiKeyManager}.
 * @internal
 */ export declare function ApiKey(options: IApiKeyOptions): ApiKeyManager;