import { ASN1Element as _Element, OBJECT_IDENTIFIER, OPTIONAL } from "asn1-ts";
import * as $ from "asn1-ts/dist/node/functional";
import { KeyUsage } from "x500-ts/dist/node/modules/CertificateExtensions/KeyUsage.ta";
export declare class Usage {
    readonly keyUsage: OPTIONAL<KeyUsage>;
    readonly extKeyUsage: OPTIONAL<OBJECT_IDENTIFIER[]>;
    constructor(keyUsage: OPTIONAL<KeyUsage>, extKeyUsage: OPTIONAL<OBJECT_IDENTIFIER[]>);
    static _from_object(_o: {
        [_K in keyof Usage]: Usage[_K];
    }): Usage;
}
export declare const _root_component_type_list_1_spec_for_Usage: $.ComponentSpec[];
export declare const _root_component_type_list_2_spec_for_Usage: $.ComponentSpec[];
export declare const _extension_additions_list_spec_for_Usage: $.ComponentSpec[];
export declare function _decode_Usage(el: _Element): Usage;
export declare function _encode_Usage(value: Usage, elGetter: $.ASN1Encoder<Usage>): _Element;
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