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Questions tagged [watchtower]

Watchtowers monitor Lightning Network channels for fraudulent closes where one party broadcasts an outdated channel state.

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3 votes
2 answers
184 views

What are some of the pitfalls and limitations of Bitcoin Lightning Network Watchtowers?

From my general understanding watchtowers, just watches the bitcoin lightning channels and makes sure no one is submitting a old payment channel transactions. What are some of the pitfalls and ...
4 votes
1 answer
157 views

What is the November 2022 bug in LND, what caused it and what would prevent a similar bug in future?

LND users are being asked as of November 2022 (as they were in October 2022) to urgently update their Lightning node software due to a bug in LND/btcd (alternative Bitcoin implementation in Go). What ...
2 votes
1 answer
407 views

What is the October 2022 bug in LND, what caused it and what would prevent a similar bug in future?

LND users are being asked as of October 2022 to urgently update their Lightning node software due to a bug in LND/btcd (alternative Bitcoin implementation in Go). What is the bug and what caused it? ...
2 votes
1 answer
249 views

What is the current status of watchtower implementations in October 2022? Are they mature, widely in use?

One way of protecting yourself against losing money as a result of bugs and crashes in your Lightning node implementation software (e.g. the recent LND bug) is to run a watchtower yourself or employ ...
15 votes
1 answer
399 views

Does eltoo require trusting watchtowers not to close channels?

The way Lightning Network works now, watchtowers maintain a list of penalty transactions to broadcast in case one party attempts to close a channel with an outdated channel state. The watchtower ...
1 vote
1 answer
117 views

Watchtower limitations and possible solutions so far in 2021-Nov?

Having read a bit more about the Lightning network. The capacity of the lightning network seems to ride on the "trust" of the counterparty you are opening a channel with along with the ...
1 vote
1 answer
143 views

How much do Bitcoin Lightning Network Watchtowers make in fees to justify their 24/7 server uptime costs?

I understand that a watchtower service for the Bitcoin lightning network requires fees to do their job. How much is this fee to justify a 24/7 server uptime cost? Can one use the bitcoin lightning ...
3 votes
1 answer
157 views

What are Bitcoin Lightning Watchtowers exactly doing for the network and users?

I'm still learning about Bitcoin lightning and learned about watchtowers. What are they doing exactly for the network and its users?
3 votes
1 answer
114 views

Is eltoo more memory efficient for watchtowers?

I vaguely remember a paper which stated that in their current implementation, lightning watchtowers require a lot of memory because they need to store information about (a penalty TX for) every ...
7 votes
2 answers
1k views

How do "trustless third-party watchers" work in Lightning Network?

The main point with LN is the need to monitor the blockchain. The reason for this is to detect if the counterparty misbehaves by publishing an old channel state to the blockchain. For a node running ...
1 vote
1 answer
143 views

What if all nodes on the lightning network were watchtowers by default?

What would be the costs for forcing every node on the lightning network to provide watchtower services by default so that the burden is shared by other users maintaining the default and with ...
1 vote
1 answer
67 views

Why is the privacy for using watch tower services increased with unpredictable commitment tx ids?

In the open channel message in BOLT 02 the following statement is written about the various basepoints. The various _basepoint fields are used to derive unique keys as described in BOLT #3 for ...
2 votes
1 answer
479 views

Network of 3rd-parties to monitor for Lightning Network theft transactions

Whenever the balance of a Lightning channel is updated, the counterparties must revoke the Commitment Transaction reflecting the channel's earlier balance, and sign a new Commitment Transaction with ...