import ID from '../../utils/uuid';
declare abstract class CarrierItem {
    key: string;
    abstract get value(): string;
    abstract set value(val: string);
    abstract set trace_Id(val: string);
    protected constructor(key: string);
}
export default class ContextCarrier extends CarrierItem {
    traceId?: ID;
    spanId?: string;
    segmentId?: ID;
    service?: string;
    serviceInstance?: string;
    endpoint?: string;
    clientAddress?: string;
    items: CarrierItem[];
    constructor(traceId?: ID, spanId?: string, segmentId?: ID, service?: string, serviceInstance?: string, endpoint?: string, clientAddress?: string, items?: CarrierItem[]);
    private encode;
    private decode;
    get value(): string;
    set value(val: string);
    set trace_Id(val: string);
    isValid(): boolean;
    static from(map: {
        [key: string]: string;
    }): ContextCarrier;
}
export {};