import type { Bridge, BridgeEnvironment, HostBridgeConfig } from "./core/types.js";
export type { Bridge, BridgeEnvironment, Envelope, EnvelopeKind, FitPayload, HostBridgeConfig, MessageContext, MessageHandler, PostTarget, RequestOptions, ResizePayload, Transport, } from "./core/types.js";
export { CHANNEL, DEFAULT_PROTOCOL_VERSION, FIT_MESSAGE, RESIZE_MESSAGE, } from "./core/constants.js";
/**
 * Create the host side of the bridge. Attaches a `message` listener immediately;
 * the channel opens once the content side connects with a supported
 * `protocol_version`.
 *
 * @example
 * ```ts
 * const bridge = createHostBridge({
 *   iframe,
 *   allowedOrigin: "https://sdk.example.com",
 *   componentId: "checkout-1",
 *   protocolVersion: 1,
 * });
 * await bridge.whenReady();
 * bridge.send("hello", { at: Date.now() });
 * const pong = await bridge.request("ping", { n: 1 });
 * ```
 */
export declare function createHostBridge(config: HostBridgeConfig, environment?: BridgeEnvironment): Bridge;
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