import type { CollectorStore } from "./store.js";
/**
 * Select the storage backend (`COLLECTOR_STORE`):
 * - `duckdb` (default) — the OSS single-file DuckDB store (events + metadata in
 *   one file, full analytics, zero external services; ADR 0020). Path from
 *   `DUCKDB_PATH`.
 * - `postgres` — the optional single-tenant Postgres store (multi-writer
 *   relational backend for shops that already run Postgres; ADR 0020, #84).
 *   Connection from `POSTGRES_URL` (or `DATABASE_URL`) plus the optional
 *   `POSTGRES_SCHEMA` / `POSTGRES_POOL_MAX`. Requires a reachable Postgres.
 * - `mssql` — the optional single-tenant Microsoft SQL Server store (for shops
 *   standardized on SQL Server / Azure SQL; ADR 0020, #85). Connection from
 *   `MSSQL_URL` or `MSSQL_SERVER` / `MSSQL_PORT` / `MSSQL_DATABASE` /
 *   `MSSQL_USER` / `MSSQL_PASSWORD`. Requires a reachable SQL Server 2022+.
 * - `clickhouse` — the optional single-tenant ClickHouse store for scale
 *   (concurrent, high-volume ingestion; ADR 0020). Connection from the
 *   `CLICKHOUSE_*` env vars. Requires a reachable ClickHouse server.
 * - `memory` — a dependency-free in-memory store for local dev / E2E tests
 *   (seed its project/key via `COLLECTOR_MEMORY_PROJECT_ID` /
 *   `COLLECTOR_MEMORY_API_KEY`).
 */
export declare function createStore(env?: NodeJS.ProcessEnv): Promise<CollectorStore>;
/**
 * Wire the production store, build the app, and listen. Fails fast if required
 * configuration is missing (see {@link loadConfig}). Shared by the
 * `uptimizr-collector` bin and the `uptimizr serve` CLI command.
 */
export declare function serve(): Promise<void>;
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