/**
 * ADR-386 — public and private swarm channels, client side.
 *
 * Channel keys live HERE, never on the gateway. A private channel is a 32-byte
 * key you generate; messages are NIP-44 v2 ciphertext under it, and the channel
 * id (`prv:<16 hex>`) is derived from the key so the name never reaches the wire.
 * You grant access by sealing the key to a member's pubkey (ECDH), which only
 * they can open. The gateway relays ciphertext and cannot decrypt it.
 *
 * `nostr-tools` is an optional dependency; every tool degrades with an install
 * hint rather than throwing at load.
 */
import type { MCPTool } from './types.js';
export declare const CHANNEL_NAME_RE: RegExp;
export declare const CHANNEL_ID_RE: RegExp;
/** Locally cached channel keys, 0600. Losing this file loses the channels in it — by design. */
export type ChannelStore = Record<string, {
    key: string;
    name?: string;
    grantedBy?: string;
    at: string;
}>;
export declare function readStore(file?: string): ChannelStore;
export declare function writeStore(store: ChannelStore, file?: string): void;
export declare function publicChannelId(name: string): string;
export declare function privateChannelId(keyHex: string): string;
export declare function newChannelKey(): string;
export declare function isPrivateChannel(id: string): boolean;
export declare const xFederationChannelTools: MCPTool[];
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