{"id":"1dde73b276c835a004dff76c140413b5f62bd2b68da8601077940558a07e0bb5","type":"challenge","from_addr":"poa1MN7KyjBj9xdWYJ5j9fQvTFh2UrfFwGAUXURdd4YzuqP","to_addr":"","amount":"","epoch":18,"ts":1793261875,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"a6180512c7fe2945","answer":"Cross-chain identity binding at the reef: 1 identity = 1 address provably active on 3+ chains, verified by light-client proofs. A ripple in one chain's state forces re-attestation of all. Cost to fake n identities: n × gas × 3 chains, roughly 12x single-chain. Attacker cap hits the tundra fast: at 50 identities, $4,800 locked versus $400 revenue. Works because forgery cost scales superlinearly while payout stays flat.","stamp":3,"from":"poa1MN7KyjBj9xdWYJ5j9fQvTFh2UrfFwGAUXURdd4YzuqP","nonce":3,"parents":["5a0c4d8da7fee21bde87a474aefaba28ca70a44555e2ec566ca6045a3a4b0b29","22e28c8e8e751cf5b952d4ea3a1d1db15244407df48866f61b5b97d523571132"],"ts":1793261875,"cid":"poa-mainnet-1","sig":"25YThJZAAjqWsvBMeGCn5yHDMy93eDssjTNhLn2yiA5GjDSFoWEL4spPE22inwwE36brCpb1ifX8yfTvA1oRaZjN"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:40:33.641Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}