Update Group chat feature (design draft)

Group-chat-feature-(design-draft).md

@@ -17,6 +17,28 @@ So, the *swarm* is defined by:
 
 *Bob wants to create a new swarm*
 
+1. Bob create a local git repository.
+2. Then, he adds an initial signed commit and adds the following:
+    + His public key in `/admins`
+    + His device certificate in ̀ /devices`
+    + His CRL in ̀ /crls`
+3. The hash of the first commit becomes the **ID** of the conversation
+4. Bob announce to his other devices that he creates a new conversation. This is done via an invite to join the swarm sent through the DHT to other devices linked to that account.
+
+## Receiving an invite
+
+*Alice gets the invite to join the previously create swarm*
+
+1. She accepts the invite
+2. A peer to peer connection between Alice and Bob is done.
+3. Alice pull the git repo of Bob. **WARNING this means that messages needs a connection, not from the DHT like today**
+4. Alice validates commits from Bob
+5. Once all commits validated and on her device, other members of the group are discovered by Alice. with these peers, she will construct the **DRT** (explained below) with Bob as a bootstrap.
+
+## Sending a message
+
+*Alice sends a message*
+
 **IN CONSTRUCTION**