Hello,
Just a small note which could be change for next homework to bring a bit more consistency and avoid issues.
The signature to handle messages is the following :
Whereas the signature for a callback is:
```go
type NewMessageCallback func(origin string, message GossipPacket)
```
It could be great to have always the same order for the parameters so "origin, message" or "message, origin" but not both changed for the next homework.
Best regards,
Bastien