/**
 * PostgresRateLimitStore — durable RateLimitStore adapter backed by PostgreSQL.
 *
 * Companion schema: src/manifest/rate-limit/stores/postgres.sql.
 *
 * Persistence model: one row per scope key. Sliding-window timestamps are
 * JSONB; window_start is epoch-ms. `mutate` runs SELECT … FOR UPDATE so
 * concurrent RateLimiter instances share one coherent bucket.
 *
 * DO NOT import this file in browser code — it requires `pg`.
 */
import type { Pool } from 'pg';
import type { RateLimitBucketState, RateLimitStore } from '../../runtime-rate-limit';
export interface PostgresRateLimitStoreOptions {
    /** A pg Pool. The store does NOT own the pool's lifecycle. */
    pool: Pool;
    /** Table name override. Default: `manifest_rate_limit_buckets`. */
    tableName?: string;
}
export declare class PostgresRateLimitStore implements RateLimitStore {
    private pool;
    private tableName;
    constructor(opts: PostgresRateLimitStoreOptions);
    get(scopeKey: string): Promise<RateLimitBucketState | undefined>;
    set(scopeKey: string, state: RateLimitBucketState): Promise<void>;
    clear(): Promise<void>;
    mutate<T>(scopeKey: string, fn: (current: RateLimitBucketState | undefined) => {
        next: RateLimitBucketState;
        result: T;
    }): Promise<T>;
    private lockGet;
    private lockSet;
}
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