> how long does it take to settle a transaction w/ bitcoin, and how well will that scale? main chain settlement will always be slow. lightning network is instant but requires a node and liquidity channels  not everyone wants to post liquidity to buy their lunch.  so the payments network is abstracted from the main chain with tradeoffs. i know how to do it 100% under my control, but most people will use a lightning service provider who takes a small fee like credit cards.
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