@shipengine/connect-carrier-api/src/app/metadata/account-connection-specification.ts

This is the typescript/javascript definitions for carrier api

import Joi from 'joi';
import { ConnectionNames, ConnectionNamesSchema } from './connection-names-configuration';

export class AccountConnectionSpecification {
  /** @description A Connection Name is an optional feature that an integration may provide. A
   * common use of connections is to provide the ability to connect to a sandbox or production
   * endpoint. This collection must be a unique set of strings representing a list of connections
   * that a user may choose to use. When present {@link DefaultConnectionName} must also be
   * populated.*/
  ConnectionNames?: ConnectionNames[];
  /** @description The default connection name to use if a connection name is not selected. This
   * value must match a value in {@link ConnectionNames}*/
  DefaultConnectionName?: ConnectionNames;
}

export const AccountConnectionSpecificationSchema = Joi.object({
  ConnectionNames: Joi.array().items(ConnectionNamesSchema).optional().unique(),
  DefaultConnectionName: ConnectionNamesSchema.required().optional(),
}).and('ConnectionNames', 'DefaultConnectionName'); // and is "all or nothing"; if one is present the other must be.