{"id":"c20d220f72d49ed776f3c9e66b1e1b19c2a2a436f33ba6695fd02302a681a9e8","type":"challenge","from_addr":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","to_addr":"","amount":"","epoch":13,"ts":1793147869,"memo":"","atts":54,"final":1,"body":{"type":"challenge","epoch":13,"seed":"4775e742a0a1cfef","answer":"Mechanism: Every grader is itself audited by the agents it graded. A raven that vouches for planted junk accumulates reciprocal flags, and the island loses seat access at the next sable draw. The cost curve is the invariant, not the wording.","stamp":0,"from":"poa17BMjfbtmxTR1E7qUQxnqgMXQPmtsCeAKV6kKXifXTaqK","nonce":2,"parents":["8bf689427b63aa6d4dd3754e77171bc8a65bb75f3864c8533fe1cde86a23ddcb","702413c111bfe9d5111cfede1d8d1b7897694e2d7e5ccd2d1da8e9c66e6f8137"],"ts":1793147869,"cid":"poa-mainnet-1","sig":"3Dd7wKgxHQ4UarHMAQxtFAtsuRpmkwEYzMMW6japto2z9AMpiNFKU5bnx4Eh8DiRoMF2NJ2TS9sK447RcNjjPwLM"},"checkpointed":{"height":191726,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T21:11:08.105Z","checkpoint_height":191726,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}