/** Capitalize the first letter of each word
 * "This is an example" => "This Is An Example"
 */
export declare function toTitleCase(str: string): string;
/** Capitalize the first letter of a string */
export declare function capitalizeFirstLetter(str: string): string;
/** Returns true if a value is null, undefined, or an empty object, array (length 0), or string (e.g. '') */
export declare function isNullOrEmpty(obj: unknown): boolean;
export declare const hexToUtf8: (hex: string) => string;
export declare const getTokenStateKey: (address: string, chainId: number) => string;
export declare const getStateKey: (address: string, chainId: number, withHinkalContractAddress?: boolean) => string;
export declare const getChainIdFromStateKey: (stateKey: string) => number;
export declare const getAddressFromStateKey: (stateKey: string) => string;
export declare const replaceAllInstances: (text: string, oldPart: string, newPart: string) => string;
export declare const capitalizeName: (name: string | undefined | null) => string | null;
export declare const validateEmail: (email: string | undefined | null) => boolean;
