import { Predicate } from 'ow';
import { Bytes } from './bytes';
export declare const owHexString: import("ow/dist/source").StringPredicate;
export declare const owBase64String: import("ow/dist/source").StringPredicate;
export declare const owBytes: () => Predicate<Bytes>;
export declare const owOptionalBytes: () => Predicate<Bytes>;
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