You can technically run it on a pruned node, but if you run a node for a long time and say you're only keeping something like, I don't know, let's go with a small number, like five gigs worth of transaction data, you will eventually lose where your channel is pinned on the chain.
Nah. The node prunes the block data but maintains an index of transactions.
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Ooooooooh. Derp thats the indexdb right?
Not sure about the file.
But as long as your node has the current UTXO set, it can see if your channel was closed.
Alright then, my understanding was incorrect.
Interesting