import Database from "better-sqlite3";
import { Context, Effect, Layer } from "effect";
export declare class DatabaseError {
    readonly message: string;
    readonly cause?: unknown | undefined;
    readonly _tag = "DatabaseError";
    constructor(message: string, cause?: unknown | undefined);
}
export interface DatabaseConfig {
    readonly path: string;
    readonly readOnly?: boolean;
    readonly fileMustExist?: boolean;
    readonly timeout?: number;
    readonly verbose?: boolean;
}
declare const DatabaseService_base: Context.TagClass<DatabaseService, "DatabaseService", {
    readonly db: Database.Database;
    readonly run: <T = Database.RunResult>(sql: string, params?: unknown[]) => Effect.Effect<T, DatabaseError>;
    readonly get: <T = unknown>(sql: string, params?: unknown[]) => Effect.Effect<T | undefined, DatabaseError>;
    readonly all: <T = unknown>(sql: string, params?: unknown[]) => Effect.Effect<T[], DatabaseError>;
    readonly exec: (sql: string) => Effect.Effect<void, DatabaseError>;
    readonly close: () => Effect.Effect<void, DatabaseError>;
}>;
export declare class DatabaseService extends DatabaseService_base {
    static Live: (config: DatabaseConfig) => Layer.Layer<DatabaseService, DatabaseError, never>;
}
export {};
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