I want to study the properties of the Lightning network graph. Is there a way to obtain a reasonably fresh snapshot containing nodes and channels (say, in JSON format)? There are multiple explorers available (e.g. listed in this question), but AFAIK none of them provides the underlying data for download.

(I could just launch my own node and query the data with allnodes / allchannels or a similar command, but that requires synching a non-pruned full node, which I’m trying to avoid at the moment.)

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