What is 0x (ZRX) Project
0x (ZRX) is an open protocol for decentralized exchange on the Ethereum blockchain. It is intended to serve as a basic building block that may be combined with other protocols to drive increasingly sophisticated dApps. 0x uses a publicly accessible system of smart contracts that can act as shared infrastructure for a variety of dApps.
Note: Bitfinex supports ERC-20 based ZRX token.