Loopring (LRC) is an Ethereum-based cryptocurrency token that forms part of an open protocol designed for the construction of decentralized crypto exchanges. The protocol aims to amalgamate the benefits of centralized order matching with decentralized on-blockchain order settlement, creating a hybrid product that aims to incorporate aspects of both centralized and decentralized exchanges. The LRC tokens were first made available to the public during an initial coin offering (ICO) in August 2017, and the Loopring protocol was first deployed on Ethereum mainnet in December 2019.

Loopring operates by combining elements of centralized and decentralized cryptocurrency exchanges to create a protocol that aims to utilize their advantages and eliminate inefficiencies. The protocol manages orders in a centralized manner but settles the trades on-blockchain. It also combines up to 16 orders into circular trades instead of allowing strictly one vs. one trading pairs. This approach aims to increase the efficiency of order execution and enhance the liquidity of decentralized exchanges. The issuance of LRC tokens is governed by the smart contracts that comprise the Loopring Protocol. Nodes on the Loopring network are rewarded in LRC tokens for combining individual orders into order rings, maintaining public order books and trade history, and in some cases broadcasting orders to other relays.

Loopring's primary use case is to provide a platform for the building of decentralized crypto exchanges. By combining the advantages of centralized and decentralized exchanges, Loopring aims to offer an efficient and transparent trading experience. The protocol's hybrid approach seeks to eliminate the custodial and transparency risks associated with centralized exchanges, while also addressing the efficiency and liquidity issues often associated with decentralized exchanges. Furthermore, Loopring's protocol allows for the creation of circular trades, which can potentially enhance liquidity and order execution efficiency.

Loopring was founded by Daniel Wang, a software engineer and entrepreneur based in Shanghai, China. Wang has held multiple managerial and executive positions in major tech companies, including Google and the Chinese e-commerce giant JD.com. He has also co-founded several companies, including the cryptocurrency services firm Coinport Technology Ltd. The LRC tokens were first made available to the public during an initial coin offering (ICO) in August 2017. The Loopring protocol was first deployed on Ethereum mainnet in December 2019. Since its inception, Loopring has been aiming to improve the cryptocurrency trading experience by combining aspects of both centralized and decentralized exchanges.