work on exchanging data

docs/api.md

@@ -0,0 +1,26 @@
+HTTP API
+------------------------------------------------
+/client/ (Private info, not publicly accessible)
+
+-   hello
+    - hello world
+-   shutdown
+    - exit onionr
+-   stats
+    - show node stats
+
+/public/
+
+-   firstConnect
+    - initialize with peer
+-   ping
+    - pong
+-   setHMAC
+    - set a created symmetric key 
+-   getDBHash
+    - get the hash of the current hash database state
+-   getPGP
+    - export node's PGP public key
+-   getData
+    - get a data block
+-------------------------------------------------