export declare function formatPrice(price: number, locale?: string, currency?: string): string;
export declare function getOrCreateUserId(storageKey?: string): string | null;
export declare function generateNonce(): string;
export declare function generateApiToken(apiKey: string, requestBody?: string): Promise<{
    timestamp: string;
    signature: string;
    nonce: string;
}>;
export declare const setApiBaseUrl: (url: string) => void;
export declare const getApiBaseUrl: () => string;
export declare const setApiKey: (key: string) => void;
export declare const getApiKey: () => string | null;
export declare const setProxyUrl: (url: string) => void;
export declare const getProxyUrl: () => string | null;
export declare const setSecretKey: (key: string) => void;
export declare const getSecretKey: () => string | null;
export declare const setDebugMode: (debug: boolean) => void;
export declare const getDebugMode: () => boolean;