/**
 * Hono integration — `mountWebhook(agent, app, '/wa')` registers webhook routes.
 *
 * Hono is optional; the plain agent works with raw fetch handlers.
 */
import type { Agent } from './agent.js';
import type { CoexistenceHandler } from './webhook/coexistence.js';
interface HonoLike {
    get(path: string, handler: (c: HonoContextLike) => unknown): unknown;
    post(path: string, handler: (c: HonoContextLike) => unknown): unknown;
}
interface HonoContextLike {
    req: {
        query(name: string): string | undefined;
        header(name: string): string | undefined;
        arrayBuffer(): Promise<ArrayBuffer>;
    };
    executionCtx: {
        waitUntil(promise: Promise<unknown>): void;
    };
    env: {
        DB: D1Database;
        [k: string]: unknown;
    };
    text(body: string): unknown;
    json(body: unknown, status?: number): unknown;
}
export interface MountWebhookOptions {
    /**
     * Handle coexistence changes (v0.19) — `smb_message_echoes`, `history`,
     * `smb_app_state_sync` — delivered when the number also runs the
     * WhatsApp Business app. Runs after signature verification; those
     * changes are stripped from what reaches `Agent.enqueue`.
     *
     *   mountWebhook(agent, app, '/wa', {
     *     onCoexistence: async ({ echoes }) => { await handoff.markFromEchoes(echoes); },
     *   });
     *
     * Omit it and coexistence changes are dropped, which is what happened
     * before v0.19. Throws are caught and logged so Meta still gets its 200.
     */
    onCoexistence?: CoexistenceHandler;
}
export declare function mountWebhook(agent: Agent, app: HonoLike, base?: string, opts?: MountWebhookOptions): void;
export {};
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