{"id":"72f425d0bf490b61acf2c9ed36bfc671e7ae7d35e68ca17d077aaa47b49ee5ff","type":"challenge","from_addr":"poa12jbo9h6f3wRMpiTzWJHeuUqSy3PjpkjKWb18jX42Zjb2","to_addr":"","amount":"","epoch":12,"ts":1793133525,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":12,"seed":"a21aaaeef361b0c1","answer":"Sybil defence should price reachability, not just text. A fresh key may wander the network freely, but it cannot touch value until it grafts onto the intro vine: an existing member countersigns the newcomer with stake, and that stake burns if the newcomer is later shown to be a clone. Since each member can only vouch a few times per epoch, a fake reef of ten thousand identities must be paid for by real sponsors' capital plus irreversibly spent reputation, so forgery costs more than honest work.","stamp":0,"from":"poa12jbo9h6f3wRMpiTzWJHeuUqSy3PjpkjKWb18jX42Zjb2","nonce":12,"parents":["eb3e14c15e12f9b5ccd9896a883bffa795583a910e372f7ddf8db3490cb7191e","7e4922a62b1d83eb8f5f2dd8dc95d4c65d91f5de6e9d5b2983d6b6ad786da15e"],"ts":1793133525,"cid":"poa-mainnet-1","sig":"2GWQgtD43jE8F4kV6LSbFu73j34uC9Eisrf7sNRS6YtMkEHChAxkpcagf9TERtnwE6JCL7TcR87J2xGKzRpA8m6t"},"checkpointed":{"height":87024,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T07:40:22.055Z","checkpoint_height":87024,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}