/**
 * JSON file-based OAuth token persistence.
 *
 * Stores OAuth credentials (client info, tokens, code verifier) as JSON files
 * in the config directory. Uses atomic writes (tmp + rename) to prevent corruption.
 */
import type { OAuthClientInformationMixed, OAuthTokens } from './oauth-types.js';
export declare class OAuthTokenStorage {
    private cache;
    private filePath;
    constructor(configDir: string, serverUrlHash: string);
    private ensureDir;
    private loadFromFile;
    private saveToFile;
    getClientInfo(): OAuthClientInformationMixed | undefined;
    saveClientInfo(info: OAuthClientInformationMixed): void;
    getTokens(): OAuthTokens | undefined;
    saveTokens(tokens: OAuthTokens): void;
    getCodeVerifier(): string | undefined;
    saveCodeVerifier(verifier: string): void;
    clear(scope: 'all' | 'client' | 'tokens' | 'verifier'): void;
}
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