import { Logger } from '../Logger';
import { Authed } from '../types/Authed';
import BaseAuthProvider from './BaseAuthProvider';
/**
 * Authenticates with the a2w API using an API key and secret.
 *
 * Posts the supplied key/secret pair to `/auth/apiGrant` to obtain an `Authed`. The
 * shared {@link BaseAuthProvider} machinery handles caching, in-flight dedup,
 * clock-skew margin, and refresh-token exchange.
 */
export default class KeysProvider extends BaseAuthProvider {
    private readonly key;
    private readonly secret;
    /**
     * Constructor.
     *
     * @param key The API key.
     * @param secret The API secret.
     * @param logger The logger to use.
     * @param baseUrl The API base URL to send the grant request to.
     */
    constructor(key: string, secret: string, logger?: Logger, baseUrl?: string);
    /**
     * @inheritdoc
     */
    protected fetchAuthed: () => Promise<Authed>;
}