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- reformatted for correct visualization
- added bullet point regarding chat apps using TLV
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Chapter overview:
* high level description of p2p interaction for the LN
Relevant questions to answer:
* Encrypted P2P Transport:
* What is the noise protocol? How does it differ from TLS? Who created it
- What is the noise protocol? How does it differ from TLS? Who created it
* and what are some of primary design principles?
- and what are some of primary design principles?
* What is an authenticated key exchange?
- What is an authenticated key exchange?
* Why does Noise offer various handshakes? What are some of unique properties certain handshakes offer?
- Why does Noise offer various handshakes? What are some of unique properties certain handshakes offer?
* What is key rotation in the context of a complete handshake? Why is it important?
- What is key rotation in the context of a complete handshake? Why is it important?
* What is "brontide"? How is it used in LN today? How can it be upgraded in the future?
- What is "brontide"? How is it used in LN today? How can it be upgraded in the future?
* LN Message Format:
* What kind of framing is used in the LN message format? What's the max message size and why is it in place?
- What kind of framing is used in the LN message format? What's the max message size and why is it in place?
* What is a varint? Why is it used in the protocol?
- What is a varint? Why is it used in the protocol?
* What are the message types of some of the popular messages in the protocol?
- What are the message types of some of the popular messages in the protocol?
* How can new messages be added in the future?
- How can new messages be added in the future?
* Feature bits:
* What are feature bits in the network, and how+where are they advertised?
- What are feature bits in the network, and how+where are they advertised?
* How can feature bits be used to phase in new features to the protocol?
- How can feature bits be used to phase in new features to the protocol?
* Today, what are some of the major feature bits used in the system?
- Today, what are some of the major feature bits used in the system?
* What's the difference between and end-to-end network upgrade and an internal network upgrade? How's the analogous to the evolution of routers and protocols in the existing internet?
- What's the difference between and end-to-end network upgrade and an internal network upgrade? How's the analogous to the evolution of routers and protocols in the existing internet?
* TLV Message Extensions:
* What does TLV stand for?
- What does TLV stand for?
* How is this related to the existing protobuf message format?
- How is this related to the existing protobuf message format?
* Where are TLV fields used in the protocol today?
- Where are TLV fields used in the protocol today?
* How can TLV fields be used to extend the protocol, existing messages, and the onion itself?
- How can TLV fields be used to extend the protocol, existing messages, and the onion itself?
- Sidenote that TLV can be used by upcoming Instant Messaging chat apps like `Whatsat`, `Sphinx Chat` or `Juggernaut`

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