import { BigNumber } from '@0x/utils' ; export const NULL_ADDRESS = '0x0000000000000000000000000000000000000000' ; export const NULL_BYTES = '0x' ; export const ZRX_DECIMALS = 18 ; export const DEFAULT_PAGE = 1 ; export const DEFAULT_PER_PAGE = 20 ; export const ZERO = new BigNumber ( 0 ) ; export const MAX_TOKEN_SUPPLY_POSSIBLE = new BigNumber ( 2 ) . pow ( 256 ) ;