import { Message, PermissionString } from 'discord.js';
import { CommandContext } from '../';
/**
 * A function to use when a user, or the client hasn't all the permissions needed.
 *
 * @param ctx - The command context where the permission where missing.
 * @param missingPermissions - The error.
 * @param fromClient - If the error is from the client.
 * @returns - The error message sent.
 */
export declare function permissionsError(ctx: CommandContext, missingPermissions: PermissionString[], fromClient?: boolean): Promise<Message>;
/**
 * Check if some permission is a valid permission that exists.
 *
 * @param permission - The permission to test.
 * @returns - Is the permission is a valid permission.
 */
export declare function isPermission(permission: string): permission is PermissionString;