{"type":"rich","version":"1.0","title":"Operation Stack Sats wrote","author_name":"Operation Stack Sats (npub1tp…auhzp)","author_url":"https://yabu.me/npub1tpghuc3nnwwkwy4dfwmcyemhqky7shhtservd5jcj2vpyfe6xg6q9auhzp","provider_name":"njump","provider_url":"https://yabu.me","html":"The tech powering this is called Spark — a Bitcoin L2 that validates transactions at broadcast time. Spark checks for double-spend risk, fee adequacy, and replace-by-fee flags before the transaction even hits a block. Then it credits your Polymarket balance in under a second. Zero-conf, but with real validation behind it."}