import { BaseKeyValueStorage, type BaseKeyValueStorageRow } from './BaseKeyValueStorage';
export interface SqliteKeyValueStorageOptions {
    /** Path to SQLite database file (can be prefixed with sqlite:) */
    path: string;
    tableName?: string;
    namespace?: string;
}
/**
 * SQLite-backed KeyValueStorage for local deployments.
 * Stores internal CSS data (OIDC tokens, migration status, etc.) in SQLite.
 */
export declare class SqliteKeyValueStorage<T = unknown> extends BaseKeyValueStorage<T> {
    private db;
    private readonly path;
    private readonly sqliteRuntime;
    constructor(options: SqliteKeyValueStorageOptions);
    protected closeStorage(): Promise<void>;
    protected hasValue(key: string): Promise<boolean>;
    protected selectValue(key: string): Promise<unknown | undefined>;
    protected upsertValue(key: string, payload: string): Promise<void>;
    protected deleteValue(key: string): Promise<boolean>;
    protected selectEntries(prefix: string): Promise<BaseKeyValueStorageRow[]>;
    private ensureDatabase;
    private getDb;
    private createDatabase;
}