Release Candidate 2 has the same awesome features as the first one but with some very important fixes and improvements. Please make sure to check them out:

Hex format for client API

Now all keys and hashes, and basically all API messages will use HEX format. It will be consistent from now and will make Iroha faster and more stable. That is a breaking change, so please make sure your Iroha is compliant: #1998

MST pending storage fixed

Previously, if batch was pending, and the same batch with all signatures comes, it went straight to the PCS. Because of that, the pending one was not removed and in theory could be replayed. Now, the system checks, if the arrived batch does already exist in MST storage, even if it has all signatures: #1959

You can now run irohad natively on windows!

There are no tests at the moment though: #1988

Memory leaks on iroha shutdown - fixed

Fixes couple of memory leaks on irohad shutdown by calling unsubscribe() in destructors: #1968

Fixed subscription to transaction status updates

In Iroha you subscribe to receive status updates of the transaction. Previously, that was based on time factor - the status stream was breaking off after some time. New round-based approach is fixing this issue - it will break off if there are no updates on the transaction in some rounds: #1980 Also fixed the case in which many transactions updates could crash clients: #1991