/// <reference types="bn.js" />
import { BN, PrefixedHexString } from 'ethereumjs-util';
export declare function formatTokenAmount(amount: number, decimals: number): string;
export declare function toWei(amount: BN | string | number | undefined, unit?: string): BN;
export declare function fromWei(amount: BN | PrefixedHexString | undefined, unit?: string, mantissa?: number): string;
export declare function formatPrice(amount: string | number, price: number): string;
export declare function trimDecimals(value: number | string, mantissa: number): string;
export declare const formatAmount: (amount?: number | string, mantissa?: number) => string;
/**
 * 后缀两位
 *
 * @param num
 * @returns
 */
export declare const toNonExponential: (num?: Number, mantissa?: number) => string;