import { type Timestamp } from './format.js';
export declare const DEFAULT_CALENDARS: string[];
export declare function calendarAllowed(uri: string): boolean;
export declare function submitDigest(calendarUrl: string, digest: Buffer, timeoutMs?: number): Promise<Timestamp>;
export declare function fetchUpgraded(calendarUrl: string, commitment: Buffer, timeoutMs?: number): Promise<Timestamp>;
export type EsploraBlock = {
    merkleroot: string;
    time: number;
};
export declare function fetchBitcoinBlock(height: number, timeoutMs?: number): Promise<EsploraBlock>;
//# sourceMappingURL=calendar.d.ts.map