import Database from "better-sqlite3";
import { type JsonValue } from "./json.js";
export type StateDatabaseMode = "read-write" | "read-only";
export type OpenStateDatabaseOptions = {
    filePath?: string;
    homeDir?: string;
    mode?: StateDatabaseMode;
    checkLegacyState?: boolean;
};
export type BlobRecord = {
    hash: Buffer;
    mediaType: string;
    byteLength: number;
    content: Buffer;
};
export declare function workflowStatePath(homeDir?: string): string;
export declare class StateDatabase {
    readonly filePath: string;
    readonly mode: StateDatabaseMode;
    readonly connection: Database.Database;
    constructor(options?: OpenStateDatabaseOptions);
    close(): void;
    transaction<T>(operation: () => T): T;
    putJson(value: unknown, now?: number): Buffer;
    putText(value: string, now?: number): Buffer;
    putBlob(content: Buffer, mediaType: string, now?: number): Buffer;
    readBlob(hash: Buffer): BlobRecord | undefined;
    readJson(hash: Buffer): JsonValue;
    integrityCheck(): void;
    backup(destination: string): Promise<void>;
    private configure;
    private prepareSchema;
    private initialize;
    private verifySchema;
}