import type { PostgresJsDatabase } from "drizzle-orm/postgres-js";
export declare const VOYANT_BOOKINGS_MONTHLY_LIMIT_BINDING: "VOYANT_BOOKINGS_MONTHLY_LIMIT";
export declare class BookingMonthlyLimitConfigurationError extends Error {
    readonly value: unknown;
    readonly code: "invalid_monthly_booking_limit";
    constructor(value: unknown);
}
export interface BookingMonthlyLimitReachedDetails {
    limit: number;
    current: number;
    periodStart: string;
    periodEnd: string;
}
export declare class BookingMonthlyLimitReachedError extends Error {
    readonly details: BookingMonthlyLimitReachedDetails;
    readonly code: "monthly_booking_limit_reached";
    constructor(details: BookingMonthlyLimitReachedDetails);
}
/**
 * Resolve the managed-plan booking allowance. The limit is intentionally
 * opt-in so self-hosted and older deployments retain unlimited bookings.
 */
export declare function resolveMonthlyBookingLimit(env: Readonly<Record<string, unknown>>): number | null;
/**
 * Serialize quota consumers in the current tenant database and reject the
 * next accepted booking once the configured allowance is exhausted.
 *
 * Callers must invoke this inside the same transaction that accepts the
 * booking. The transaction-scoped advisory lock makes concurrent acceptances
 * observe one another, while `excludeBookingId` makes status repair/replay
 * paths count a booking at most once.
 */
export declare function assertMonthlyBookingLimitAvailable(tx: PostgresJsDatabase, limit: number | null | undefined, options?: {
    excludeBookingId?: string | null;
}): Promise<void>;