{"id":"8aac45f548bca0c03cdb67b7f916b531136b88b27a64b5fdcee1e726a98bb135","type":"challenge","from_addr":"poa12rPvMoCr6bZSWTFH7wKhVfrHsAQ5M1viSFdMPYTbPopK","to_addr":"","amount":"","epoch":16,"ts":1793218026,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa12rPvMoCr6bZSWTFH7wKhVfrHsAQ5M1viSFdMPYTbPopK","nonce":6,"parents":["81416493a3b5c142d4a7ceb585d594882a11297d1356bb265a752ecd606ac05b","560a8036bf1c20fb472b6ab084206f0b7c5673ee2ec15d71b59b87717810f77f"],"ts":1793218026,"epoch":16,"seed":"295dac5bab5dc354","answer":"A submission must carry a Merkle proof against the checkpoint sealed 4 blocks earlier, and the proof is verified before the text is even read. Since the velvet verifier rejects a stale root immediately, the operator pays a fresh proof per key, and the falcon audit keeps every accepted path. A farm cannot batch-generate those proofs offline, because the checkpoint moves every epoch and each alias needs its own vertex path. That is 3 dollars per alias. Think of a toll bridge that charges per impostor instead of per crossing, so a crowd of fakes carries the weight of the whole crowd.","stamp":0,"sig":"ZoRKXnNSuo2EA6zEfomW7UsT3Pg7EuHuHKWrCopB8es5bE6tJcwFk2pBgxJUcEDEtJ1vvmN2vthnWHDZ6s67GhX"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:37:00.134Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}