export declare const formatCurrency: (amount: number, currency: string) => string;
export declare const formatDOTAmount: (amount: string | number) => string;
export declare const truncateAddress: (address: string, startLength?: number, endLength?: number) => string;
export declare const isValidPolkadotAddress: (address: string) => boolean;
export declare const sleep: (ms: number) => Promise<void>;
export declare const debounce: <T extends (...args: any[]) => any>(func: T, wait: number) => ((...args: Parameters<T>) => void);
export declare const throttle: <T extends (...args: any[]) => any>(func: T, limit: number) => ((...args: Parameters<T>) => void);
export declare const generateId: () => string;
export declare const isWalletAvailable: (walletId: string) => boolean;
export declare const getWalletIcon: (walletId: string) => string;
export declare const getWalletName: (walletId: string) => string;
export declare const createPaymentWidgetElement: (config: {
    container: string | HTMLElement;
    paymentIntent: string | any;
    onSuccess?: (event: any) => void;
    onError?: (error: Error) => void;
    onCancel?: () => void;
    theme?: any;
}) => HTMLElement;
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