export declare function base64Encode(src: string): string;
export declare function isBrowser(): boolean;
export declare function delay(ms: number): Promise<void>;
export declare function translateExponentNumberString(num: number): string;
export declare function isNumber(n: string): boolean;
export declare function roundString(num: string): string;
export declare function multiplyString(num: string, pow: number): string;
export declare function truncateAfterDecimals(num: string | number, decimals: number): string;