/**
 * Loads `createHostBridge` for the web_view host bridge from the CDN IIFE:
 * `https://sdk.revenuecat-static.com/v<major>/rc-host.iife.js` → `window.RCHost`.
 *
 * Classic `<script src>` is Metro-safe (no non-literal dynamic `import()`). The
 * ESM sibling at `/v<major>/rc-host.js` remains for other consumers. Types and
 * message constants come from `@revenuecat/workflow-web-components-sdk`.
 */
import type { HostBridge, HostBridgeConfig } from "@revenuecat/workflow-web-components-sdk";
export { FIT_MESSAGE, RESIZE_MESSAGE, } from "@revenuecat/workflow-web-components-sdk";
export type { ResizePayload } from "@revenuecat/workflow-web-components-sdk";
/** Base origin the versioned SDK builds are served from. */
export declare const SDK_BASE_URL = "https://sdk.revenuecat-static.com";
/**
 * The subset of the SDK host bridge purchases-ui-js uses: subscribe to a
 * message, run a callback once the channel opens, fire-and-forget, push a
 * later paywall-context snapshot, and tear down.
 */
export type WebViewHostBridge = Pick<HostBridge, "on" | "onReady" | "send" | "destroy" | "setContext">;
export type CreateHostBridge = (config: HostBridgeConfig) => HostBridge;
/** Test factories may return only the bridge surface this package uses. */
export type CreateHostBridgeForTests = (config: HostBridgeConfig) => WebViewHostBridge;
declare global {
    interface Window {
        RCHost?: {
            createHostBridge?: CreateHostBridge;
        };
    }
}
type ScriptLoader = (url: string) => Promise<CreateHostBridge>;
/** Stable, rolling per-major URL of the host bridge IIFE build. */
export declare function hostSdkUrl(protocolVersion: number): string;
/**
 * Resolve `createHostBridge` for a protocol major from the CDN. Rejects on an
 * invalid `protocol_version` or a failed script load so callers can degrade to
 * a render-only iframe.
 */
export declare function loadCreateHostBridge(protocolVersion: number): Promise<CreateHostBridge>;
/**
 * Override the host-bridge factory. Intended for tests so they never exercise
 * the real postMessage wiring. Pass `null` to restore CDN loading.
 */
export declare function __setCreateHostBridgeForTests(factory: CreateHostBridgeForTests | null): void;
/**
 * Override the script loader (and clear the cache). Intended for tests that
 * assert the CDN URL without hitting the network.
 */
export declare function __setHostScriptLoaderForTests(fn: ScriptLoader | null): void;
/**
 * Make `loadCreateHostBridge` reject so callers (e.g. WebView) can assert they
 * degrade to a render-only iframe. Pass `null` to clear.
 */
export declare function __failCreateHostBridgeForTests(error: Error | null): void;