Raft is used to Replicate write in a shard but distributed transaction is used to make transaction that span several shard atomic (ACID). I could find the imple

Raft is used to Replicate write in a shard but distributed transaction is used to make transaction that span several shard atomic (ACID). I could find the implementation at : https://github.com/pingcap/tikv/blob/master/src/storage/mvcc/txn.rs https://github.com/pingcap/tikv/blob/master/src/storage/mvcc... But a lot of the detail are not clear.