import { type EventSigner, type NostrEvent, type NostrLink, type NotSignedNostrEvent, type SystemInterface } from "..";
/**
 * Safely sync replacable events to nostr
 *
 * Usefule for the following critical kinds:
 * 0 (Metadata)
 * 3 (Contacts)
 * 10002 (Relays)
 * 30078 (AppData)
 */
export declare class SafeSync {
    #private;
    readonly link: NostrLink;
    constructor(link: NostrLink);
    /**
     * Return a copy of the internal value
     */
    get value(): {
        id: string;
        pubkey: string;
        created_at: number;
        kind: number;
        tags: Array<Array<string>>;
        content: string;
        sig: string;
    } | undefined;
    get didSync(): boolean;
    /**
     * Fetch the latest version
     */
    sync(system: SystemInterface): Promise<boolean>;
    /**
     * Set the base value
     * @param ev
     */
    setBase(ev: NostrEvent): void;
    /**
     * Publish an update for this event
     *
     * Event will be signed again inside
     * @param ev
     */
    update(next: NostrEvent | NotSignedNostrEvent, signer: EventSigner, system: SystemInterface, mustExist?: boolean): Promise<void>;
}
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