import * as t from 'io-ts';
export { isValidUrl, URL_REGEX } from '@celo/base/lib/io';
export declare const UrlType: t.Type<string, string, unknown>;
export declare const JSONStringType: t.Type<string, string, unknown>;
export declare const AddressType: t.Type<string, string, unknown>;
export declare const PublicKeyType: t.Type<string, string, unknown>;
export declare const SignatureType: t.StringC;
export declare const SaltType: t.StringC;
export type Signature = t.TypeOf<typeof SignatureType>;
export type Address = t.TypeOf<typeof AddressType>;