/**
 * Self-initialization from the bundle's own <script> URL.
 *
 * Used by the Tiendanube 1-click install (Scripts API): Tiendanube injects
 *   <script src="https://unpkg.com/...bundle.min.umd.cjs?apiKey=<uid>&s=<base64url>">
 * and the bundle configures itself from those params — zero requests to the
 * NotChatbot backend on page view. The `s` payload is built SERVER-SIDE when
 * the script is (re)associated to the store, so this module only decodes it;
 * it never derives styles on its own.
 *
 * ⚠️ CRITICAL BACKWARD COMPATIBILITY ⚠️
 * Every existing GTM/manual customer loads this same bundle from @latest
 * WITHOUT query params. For any src without `apiKey` this module MUST return
 * null and MUST NOT throw — the bundle then behaves exactly as before
 * (waiting for a manual WebChat.initialize). Keep every code path here
 * defensive: a broken payload degrades to apiKey-only defaults, never to an
 * error that could interfere with the bundle load.
 */
/** Versioned payload carried in the `s` query param (base64url of its JSON). */
export interface StylesParamV1 {
    v: 1;
    /** Fully-resolved WebChatConfig (minus apiKey), built server-side. */
    c: Record<string, unknown>;
    /** CSS for window.injectWebChatCSS (button resize), or null. */
    css: string | null;
}
export interface SelfInitPayload {
    apiKey: string;
    /** Resolved config from `s`, or null to initialize with defaults. */
    config: Record<string, unknown> | null;
    injectCss: string | null;
}
/** Encodes a styles payload to base64url. Exported for tests and tooling; production encoding lives server-side. */
export declare function encodeStylesParam(payload: StylesParamV1 | Record<string, unknown>): string;
/**
 * Parses the bundle's own script src. Returns null unless the URL carries an
 * `apiKey` query param (the self-init opt-in marker). A present-but-broken
 * `s` param degrades to apiKey-only (default appearance) instead of failing.
 */
export declare function parseSelfInitFromSrc(src: string): SelfInitPayload | null;