import type { DatabaseProxyOptions } from './database-proxy-options.js';
export declare const DEFAULT_LOCAL_PROXY_PORT = 5433;
/** Declared here rather than imported: the Hosting schema types are private. */
export interface DatabaseAccessSession {
    databaseAccessSessionId: string;
    username: string;
    password: string;
    databaseName: string;
    expiresAt: string;
    databaseProxyUrl: string;
}
export declare const minutesUntil: (expiresAt: string, now?: number) => number;
/**
 * Hosting may grant less than was asked for. The minute of tolerance absorbs
 * the round trip.
 */
export declare const formatClampedTtlWarning: (requestedMinutes: number | undefined, expiresAt: string, now?: number) => string | undefined;
export declare const WARN_BEFORE_EXPIRY_MS: number;
/** Undefined when the session is too short for the warning to precede it. */
export declare const toExpiryWarningDelay: (expiresAt: string, now?: number) => number | undefined;
export declare const toConnectionJson: (session: DatabaseAccessSession, port: number) => Record<string, string | number>;
export declare const formatConnectionDetails: (session: DatabaseAccessSession, port: number, now?: number) => string;
export declare const proxyDatabase: (args: Required<Pick<DatabaseProxyOptions, "serviceId">> & DatabaseProxyOptions) => Promise<void>;
/**
 * Validate arguments for proxying a direct database connection.
 */
export declare const validateDatabaseProxyArgs: (args: DatabaseProxyOptions) => [DatabaseProxyOptions, string[]];