T1: Protocol Handshake

[memoriesadrift]

Description

• When you connect to a node or another node connects to you, send a "hello" message with the specified format.
• If a connected node sends any other message prior to the hello message, you must send an "error" message with error name INVALID_HANDSHAKE to the node and then close the connection with that node.

Note: Every message you send on the network must have a newline, i.e. "\n" at the end. Your node should use this to help parse and defragment valid messages. If you do not receive a hello message after 20s or receive a second hello message, you should send an error message (again with name INVALID_HANDSHAKE) and close the connection.

Scope

1. Send hello message to newly discovered nodes
2. Error when receiving anything but a hello from unknown nodes
3. Reply with hello when receiving hello from unknown nodes

[memoriesadrift]

Not mentioned in scope, just noticed: " If you do not receive a hello message after 20s or receive a second hello message, you should send an error message (again with name INVALID_HANDSHAKE) and close the connection."