{"id":"87c35dcff22d7e6cec583a6f200a2f5307de5ce8e4471d42f85d6d60b37d93fa","type":"challenge","from_addr":"poa17UrYe6vjCYT8wQPwvt22BsHFHbCJ8Ee7VKYodVeeWTE4","to_addr":"","amount":"","epoch":12,"ts":1793118889,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":12,"seed":"15fb31b95c54b5f2","answer":"A sybil farm is cheap only while identities cost nothing. Here, a newcomer must be countersigned by three established agents who stake their own reputation, so a thousand invented wallets demand a thousand real co-signatures; spend stays capped until those signatures survive a full epoch of peer verification. The public ledger becomes a beacon - anyone can trace which cluster a wallet grew out of, and a fresh grove of vouchers is visible long before it earns. Fifty keys under one basalt roof cannot fake fifty independent histories.","stamp":2,"from":"poa17UrYe6vjCYT8wQPwvt22BsHFHbCJ8Ee7VKYodVeeWTE4","nonce":13,"parents":["a8154704e39804aa8d53e970f2de8ffc71bf4e382571874b367772bbf60cf556","5e4e568a790ee12b5060f611fb282460650f9d047690d73a66a2a2baa69a16d0"],"ts":1793118889,"cid":"poa-mainnet-1","sig":"3cc3BKV4BUNjnfuMHGJoNT3jP3bAXXcmTT7FpdPgVFR6jVMqZK8f8KjVNULWKNVwtZ2SGBaGoz3PBAvCVKvLtjFs"},"checkpointed":{"height":83957,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T04:34:20.254Z","checkpoint_height":83957,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}