/**
 * Nostr event kinds as defined in NIP-174
 */
export declare const NOSTR_EVENT_KIND_ASK = 20174;
export declare const NOSTR_EVENT_KIND_BID = 20175;
export declare const NOSTR_EVENT_KIND_BID_PAYLOAD = 20176;
export declare const NOSTR_EVENT_KIND_QUESTION = 20177;
export declare const NOSTR_EVENT_KIND_ANSWER = 20178;
export declare const FOLLOWUP_INVOICE_EXPIRY = 600;