Dai is issued and operated by MakerDAO, which was established in 2014 and has a long history. The MakerDAO protocol is one of the largest decentralized applications on the Ethereum blockchain and the first DeFi application to be adopted on a large scale. Its main service is to forge a decentralized stablecoin: Dai. The mechanism of Maker is to allow users to use crypto assets supported by the protocol as collateral to mint (lend) Dai, and charge a stability fee (borrowing interest) for the Da...