import { IVpcConnectorTunnelOptions } from '../database/types/connection.interface';
import { EnvType, IRequestExtension } from '../types';
export interface IVpcConnectorTunnelConnectHint {
    useVpcConnectorTunnel?: boolean;
    cloud?: string;
}
/**
 * Builds the `{ vpcConnectorTunnel: {...} }` adapter option used by adapters that accept a
 * custom stream/socket directly (e.g. the graph module's Neptune adapter). Database adapters
 * no longer use this — see databases.service.ts, which instead opens the tunnel centrally and
 * rewrites the connection string to point at a local proxy (works for drivers that cannot
 * accept a custom stream).
 */
export declare function buildVpcConnectorTunnelAdapterOptions(hint: IVpcConnectorTunnelConnectHint, connectionUrl: string, ctx: {
    environment: EnvType;
    auth: IRequestExtension;
}): {
    vpcConnectorTunnel?: IVpcConnectorTunnelOptions;
};