import type { HeadRecord, IHeadRegistryDriver } from '../interfaces/storage/headRegistryDriver';
/**
 * InMemoryHeadRegistryDriver — Map-backed driver, no I/O.
 * Used for tests and as a fallback when no persistent store is available.
 */
export declare class InMemoryHeadRegistryDriver implements IHeadRegistryDriver {
    private readonly store;
    readRecord(key: string): Promise<HeadRecord | null>;
    writeRecord(key: string, record: HeadRecord): Promise<void>;
    deleteRecord(key: string): Promise<void>;
    listKeys(): Promise<string[]>;
}
//# sourceMappingURL=inMemoryHeadRegistryDriver.d.ts.map