export interface CheckpointStore {
    readonly get: (key: string) => Promise<unknown | undefined>;
    readonly set: (key: string, value: unknown) => Promise<void>;
    readonly has: (key: string) => Promise<boolean>;
    readonly delete: (key: string) => Promise<void>;
    readonly close: () => void;
}
export declare function makeCheckpointStore(dbPath: string): CheckpointStore;