The actual DMD Diamond Mainnet is based on V3-Technology. It can be traded at bitmart and p2b. Coins, you buy based on v3 Technology, can be claimed at v4 launch 1:1. This website describes DMD V4, which is availiable as a test-network at the moment. For further informations to the currently running V3-Main-Network, visit https://diamond-info.github.io/.
As we move closer to the DMDv4 mainnet launch by year-end, you should get acquainted with the operations coming with the next version of the DMD diamond blockchain. This would help you...