/**
 * CBS silent-login shared constants + state-key helpers (direct-fetch variant).
 *
 * Used by the webtrade iframe receiver (`eaera-webtrade` →
 * `composables/useSilentLoginReceiver.ts`) when running embedded inside the
 * super-app parent. The iframe persists the `stateKey` returned by
 * `authStore.cbsStart()` here and reads it back when the parent posts the
 * `eaera:silent-login:callback` message.
 */
/** localStorage key holding the CBS `stateKey`. */
export declare const CBS_STATE_KEY_STORAGE = "cms_sdk_cbs_state_key";
/** postMessage `type` discriminators for the silent-login handshake. */
export declare const SILENT_LOGIN_MESSAGE: {
    /** parent → iframe: kick off the handshake. */
    readonly START: "eaera:silent-login:start";
    /** iframe → parent: CBS `authorizeUrl` ready for the parent to fetch. */
    readonly AUTHORIZE_READY: "eaera:silent-login:authorize-ready";
    /** parent → iframe: handshake failed (`code`). */
    readonly ERROR: "eaera:silent-login:error";
    /** parent → iframe: user logged out of the parent; tear down the session. */
    readonly LOGOUT: "eaera:logout";
};
/** Read the persisted CBS `stateKey` (empty string when absent / non-browser). */
export declare function readCbsStateKey(): string;
/** Clear the persisted CBS `stateKey` (call after `/cbs/callback` settles). */
export declare function clearCbsStateKey(): void;
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