Any insight on this Spark thing? On one level, it sounds custodial (which, in my view, In my view, is ok up to "pocket-change" level), but then it sounds okay with owner holding 1 of 2 keys and is therefore not exactly custodial. All told, I'm not too sure what to make of it.
https://atlas21.com/spark-the-layer-2-launched-by-lightspark #bitcoin

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