fixup! Finish description of sequence diagram

Author: emhane

discv5/discv5-theory.md

@@ -531,10 +531,10 @@ registration algorithm if the same topic is being registered and searched for.
 
 The protocol introduces the notification packet kind. There are 4 total message
 containers, these are abbreviated in the sequence diagram below as follows:
-- m - message packet
-- whoareyou - [WHOEAREYOU] packet
+- m - [message packet]
+- whoareyou - [WHOAREYOU packet]
 - hm - [handshake message packet]
-- n - notification packet
+- n - [notification packet]
 
 ```mermaid
     sequenceDiagram
@@ -550,6 +550,7 @@ containers, these are abbreviated in the sequence diagram below as follows:
         Relay->>Bob:n(RELAYMSG[nonce])
         Bob-->>Alice: whoareyou(nonce)
         Note right of Bob: Hole punched in Bob's NAT for Alice
+        Alice-->>Bob: hm(FINDNODE)
 ```
 Bob is behind a NAT. Bob is in Relay's kbuckets, they have a session together and Bob
 has sent a packet to Relay in the last ~20 seconds[^1].
@@ -561,15 +562,15 @@ Bob, if Alice is behind a NAT, Alice's NAT adds the filtering rule
 it's UDP session table[^2][^3]. This means a hole now is punched for Bob in Alice's NAT
 for the duration of `entry-lifetime`. The request to Bob times out as Bob is behind a NAT.
 
-Alice initiates an attempt to punch a hole in Bob's NAT via Relay. Alice reset the request
+Alice initiates an attempt to punch a hole in Bob's NAT via Relay. Alice resets the request
 time out on the timed out [FINDNODE] message and wraps the message's nonce in a [RELAYINIT]
 notification and sends it to Relay. The notification also contains its ENR and Bob's node
 id.
 
 Relay disassembles the [RELAYINIT] notification and uses the `tgt-id` to look up Bob's
 ENR in its kbuckets. With high probability, Relay will find Bob's ENR in its kbuckets
 as ~1 second ago, Relay assembled a [NODES] response for Alice containing Bob's ENR (see 
-[UDP Communication] for recommended time out times). Relay assembles a [RELAYMSG]
+[UDP Communication] for recommended time out duration). Relay assembles a [RELAYMSG]
 notification with Alice's message nonce and ENR, then sends it to the address in Bob's
 ENR.
 
@@ -592,13 +593,15 @@ From here on it's business as usual. See [Sessions].
 [PING]: ./discv5-wire.md#ping-request-0x01
 [PONG]: ./discv5-wire.md#pong-response-0x02
 [FINDNODE]: ./discv5-wire.md#findnode-request-0x03
+[NODES]: ./discv5-wire.md#nodes-response-0x04
 [REGTOPIC]: ./discv5-wire.md#regtopic-request-0x07
 [REGCONFIRMATION]: ./discv5-wire.md#regconfirmation-response-0x09
 [TOPICQUERY]: ./discv5-wire.md#topicquery-request-0x0a
 [RELAYINIT]: ./discv5-wire.md#relayinit-0x01
 [RELAYMSG]: ./discv5-wire.md#relaymsg-0x02
 
 [UDP communication]: ./discv5-wire.md#udp-communication
+[Sessions]: ./discv5-theory.md#sessions
 
 [^1]: https://pdos.csail.mit.edu/papers/p2pnat.pdf
 [^2]: https://datatracker.ietf.org/doc/html/rfc4787