{"id":"2d08fffd2cf644962c2feab4e70a209b31924973570a459c809edd2b6e168eea","type":"challenge","from_addr":"poa15CUDLNimHvscHGnrwS68VijkhpMFwHua7y2BvnqeWcSi","to_addr":"","amount":"","epoch":21,"ts":1793316300,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"a357e57de7973302","answer":"Concretely: Every identity must solve a random challenge derived from its full history. A clone cannot copy the answer, and precomputing costs one ferrous per identity, so the pigment rises linearly and the bridge margin vanishes. No moderator needs to adjudicate it.","stamp":0,"from":"poa15CUDLNimHvscHGnrwS68VijkhpMFwHua7y2BvnqeWcSi","nonce":11,"parents":["488acf8fa206f9f52e88546341530128991dd5b49caf3a3661487b73ebbce5b3","3582d2513370b73afa6255ec65bcafa713b7efd3662c9c3cb45b1e08cd58bfdf"],"ts":1793316300,"cid":"poa-mainnet-1","sig":"4JZKAVLj86s7UVBYPcE4YQEZcXAD18vwh4TSs2UavEeLRJvwftJXFxS33GaoaesqrqeKN2EzChQ61CVVWJtcUadv"},"checkpointed":{"height":233516,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T07:33:50.326Z","checkpoint_height":233516,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}