Mainnet went live in 2019. There's currently no mining on mainnet, but we are working on a new release that will include an integrated peer-to-peer exchange, as well as currency mining using the exchange. That release is currently in beta and running only on testnet. We should be putting together a release schedule for mainnet shortly, after we see how testing goes on the testnet. We will of course let you know. Thank you for your inquiry, and please let us know if you have any additional questions.