/**
 * OAuth token management for Spinta API
 */
/**
 * Token cache for managing OAuth tokens
 */
export declare class TokenCache {
    private cachedToken;
    private readonly authUrl;
    private readonly clientId;
    private readonly clientSecret;
    private readonly scopes;
    constructor(authUrl: string, clientId: string, clientSecret: string, scopes: readonly string[]);
    /**
     * Check if current token is valid (exists and not near expiry)
     */
    isValid(): boolean;
    /**
     * Get current token, fetching or refreshing if needed
     */
    getToken(): Promise<string>;
    /**
     * Fetch a new token from the auth server
     */
    private refresh;
    /**
     * Clear the cached token (useful for logout or forced refresh)
     */
    clear(): void;
}
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