{"type":"rich","version":"1.0","title":"mleku wrote","author_name":"mleku (npub1fj…mleku)","author_url":"https://yabu.me/npub1fjqqy4a93z5zsjwsfxqhc2764kvykfdyttvldkkkdera8dr78vhsmmleku","provider_name":"njump","provider_url":"https://yabu.me","html":"checkpoints are hard coded height/hash values that save time on checking when doing IBD, what's the logic?"}