import type { Credentials } from "./credentials.js";
export declare class TokenCache {
    private readonly creds;
    private token;
    private expiresAt;
    private inFlightRefresh;
    constructor(creds: Credentials);
    getToken(): Promise<string>;
    private refresh;
    /** Returns metadata about the cached token without forcing a refresh. */
    status(): {
        hasToken: boolean;
        expiresAt: number | null;
        expiresInSec: number | null;
    };
    /**
     * Drop the cached token so the next getToken() call hits IMS again.
     * Used by firefly_check_auth's force_refresh flag and by callers that
     * know a token has been revoked server-side.
     */
    invalidate(): void;
}
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