add cycle dialog

ARCHITECTURE.md

@@ -20,3 +20,6 @@ Whirlpool is modular:
 
 ![](charts/architecture.png)
 
+
+## III. Cycle dialog
+![](charts/dialog.png)

charts/dialog.md

+sequenceDiagram
+    Note over Client,Server: << WEBSOCKET >>
+
+    Note left of Client: Connecting...
+    Client->>+Server: subscribe pool
+    Server -->>-Client: SubscribePoolResponse
+
+    Note left of Client: Waiting for a mix...
+    Note over Client,Server: ... A new mix starts!
+    Server-->>Client: ConfirmInputMixStatusNotification
+
+    Note left of Client: Trying to join a mix...
+    Client->>+Server: ConfirmInputRequest
+    Server -->>-Client: ConfirmInputResponse
+    Note left of Client: Joined a mix!
+
+    Note over Client,Server: ... Anonymity set reached!
+
+    Server -->>+Client: RegisterOutputMixStatusNotification
+    Note left of Client: Registering output...
+
+    Note over Client / alt. identity,Server: << REST >> from alternate identity
+    Client / alt. identity->>-Server: RegisterOutputRequest
+    Note left of Client: Registered output
+
+    Note over Client,Server: ... All outputs registered!
+
+    Server -->>+Client: SigningMixStatusNotification
+    Note left of Client: Signing...
+    Client->>-Server: SigningRequest
+    Note left of Client: Signed
+
+    Note over Client,Server: ... All signed!
+    Server -->>+Client: SuccessMixStatusNotification