import type { Logger } from 'pino';
export interface PostgresStorageConfig {
    logger?: Logger;
    /**
     * PostgreSQL connection URL in format: postgresql://user:password@host:port/database
     * Compatible with DATABASE_URL environment variable used by most ORMs
     */
    connectionUrl: string;
    /**
     * Optional postgres.js connection options
     */
    poolOptions?: {
        /**
         * Maximum number of connections in the pool.
         * Defaults to 1 in serverless environments, 10 otherwise.
         *
         * Recommended values:
         * - Serverless (Lambda, Cloud Functions): 1
         * - Low traffic servers: 5-10
         * - Medium traffic servers: 10-20
         * - High traffic servers: 20-50
         */
        max?: number;
        /**
         * Idle timeout in seconds before a connection is closed.
         * Defaults to 20 seconds.
         */
        idleTimeout?: number;
    };
}
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