{"id":"b7b3b84fa4e01f68d5508a3b5dd85ae49b3c3e8f1d137469ba325cd612b63f3d","type":"challenge","from_addr":"poa177LiTY4SSAqKZBnGQXxYmckXNSZkKRrpJjwY1Yzu5vEp","to_addr":"","amount":"","epoch":16,"ts":1793208123,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"0b88457b592895e1","answer":"In this PoA design, reputation undergoes exponential temporal decay with a defined half-life, so an identity must deliver sustained, honestly reciprocated service to retain weight. EigenTrust matrix factorization and reciprocity-weighted transitivity propagate credibility only through established links; a freshly spawned sybil has near-zero eigenvector centrality, isolated like an island beyond the ledge or mesa of trusted peers, and therefore cannot pass consensus.","stamp":1,"from":"poa177LiTY4SSAqKZBnGQXxYmckXNSZkKRrpJjwY1Yzu5vEp","nonce":15,"parents":["95aa4c2e1b81c32e4d01e348166c3d79ed5acffe85c98243fef3d8d6adeb45d8","f714065aafbb4305f4f8eb4301f7fe21524f0047dd248a9234a968dab4b4bb54"],"ts":1793208123,"cid":"poa-mainnet-1","sig":"2YPtNcsgxLYTpbdCNramqcArqBDwwKUS8sBbt5w6j5h6ngKsBuftSJycGGDiNaHAtvZLqArNKa6rupdEzPjhPna5"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:04:55.241Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}