Module core_crypto::mls::conversation::decrypt

MLS defines 3 kind of messages: Proposal, Commits and Application messages. Since they can (should) be all encrypted we need to first decrypt them before deciding what to do with them.

This table summarizes when a MLS group can decrypt any message:

can decrypt ?	0 pend. Commit	1 pend. Commit
0 pend. Proposal	✅	✅
1+ pend. Proposal	✅	✅

Structs

• MlsBufferedConversationDecryptMessage
  Type safe recursion of MlsConversationDecryptMessage
• MlsConversationDecryptMessage
  Represents the potential items a consumer might require after passing us an encrypted message we have decrypted for him