import { type URISchemes } from "../util/uri.js";
import { type URLString } from "../util/url.js";
import type { StringSchemaOptions } from "./StringSchema.js";
import { StringSchema } from "./StringSchema.js";
/** Allowed options for `URLSchema` */
export interface URLSchemaOptions extends Omit<StringSchemaOptions, "input" | "min" | "max" | "rows"> {
    readonly base?: URL | URLString | undefined;
    readonly schemes?: URISchemes | undefined;
}
/**
 * Type of `StringSchema` that defines a valid URL string.
 * - Checks URL scheme against a whitelist (always), and checks URL domain against a whitelist (optional).
 * - URLs are limited to 512 characters, but generally these won't be data: URIs so this is a reasonable limit.
 */
export declare class URLSchema extends StringSchema {
    readonly base: URLString | undefined;
    readonly schemes: URISchemes;
    constructor({ one, title, base, schemes, ...options }: URLSchemaOptions);
    validate(unsafeValue: unknown): URLString;
    sanitize(str: string): string;
    format(value: string): string;
}
/** Valid URL string, e.g. `https://www.google.com` */
export declare const URL_SCHEMA: URLSchema;
/** Valid URL string, e.g. `https://www.google.com`, or `null` */
export declare const NULLABLE_URL_SCHEMA: import("./NullableSchema.js").NullableSchema<string>;