Grin is an open-source software project that implements the MimbleWimble blockchain and fills in some of the necessary things for implementing a complete blockchain and cryptocurrency (which is missing from the MimbleWimble protocol).The main objectives and characteristics of the Grin project are as follows:The default feature of privacy protection. This gives it complete substitutability and retains the ability to selectively disclose information on demand.The block size matches the transaction volume, and only about 100 bytes of transaction cores are retained for historical transactions, saving a lot of space compared to other blockchain links.Powerful and validated cryptography. MimbleWimble only uses elliptic curve cryptography, which has been tried and tested for decades.Simple design makes future code review and maintenance easy.Community driven. Adopting a mining algorithm that resists ASIC (Cuckoo Cycle algorithm) to encourage decentralized mining....