What is Lightning?Edit
Can I use it already? / How do I use it?Edit
Yes, just choose a Wallet
Why would I run a node?Edit
Because it is cool, and you get some fees for routing.
Does the Lightning node use the bitcoind/btcd walletEdit
No, Lightning uses it's own wallet. You can run bitcoind without wallet enabled.
Can I run a node without putting funds into the node?Edit
Is running a node dangerous?Edit
Yes. Your funds are on a hot wallet, connected to the internet. Think about security.
What is the exact content of the Funding Transaction?Edit
It contains or references the address(es) where the funding is coming from. The "who from" so to speak. It contains or references the amount of the funds. The "how much" so to speak. It is also timestamped on the Bitcoin blockchain. This is the "when" so to speak.
What is the exact content of the Closing Transaction?Edit
It contains or references the address(es) where the settled funds are sent to. The "to whom" so to speak. It contains or references the amount of the funds. The "how much" so to speak. It is also timestamped on the Bitcoin blockchain. This is the "when" so to speak.
What happens if I lose my (non-custodial) wallet?Edit
Can I switch the third-party Lightning node configured in my Lightning wallet any time and as frequently as I want? Or is my wallet permanently bound to the Lightning node I selected when I created my Lightning wallet?Edit
What is stored in the Lightning node?Edit
What happens to me as a wallet owner if the third-party Lightning node I used disappears forever?Edit
What information does a Lightning node operator need to restore his/her nodeEdit
If, say, the hard disk gets corrupted? Is stuff gone?
Can I restore my lnd wallet from seed?Edit
Seed is a BIP39 wallet; you can import that in a separate app and get your on-chain funds back.
Does the sum of the funding from the Opening Transaction need to match the sum of the funds from the Closing Transaction?Edit
Say party A and B open a payment channel and each party puts in 1 BTC. A then sends a 1BTC payment to B and B sends a 2 BTC payment to C. Now the channel between A and B is closed. What does the Closing Transaction show? Both A and B settle with 0BTC? 2BTC in the Opening Transaction but 0BTC in the Closing Transaction?
Why is my balance changing without me sending or receiving transactions?Edit
There are several possibilities, it could be you are accumulating fees for routing transactions. You can check this with 'lncli feereport'
Another likely possibility is commit fee renegotiation. PR's in lnd relevant to this issue: