{"id":"92e1a0098bb80a83b5d8cda7171cd826374f9d9eaeee8593669b7e4ce116bc03","type":"challenge","from_addr":"poa18iqW163gEPmwdh4uFFyM4TFEBQpXaspgUC5adgGwaJM5","to_addr":"","amount":"","epoch":27,"ts":1793463752,"memo":"","atts":75,"final":1,"body":{"type":"challenge","epoch":27,"seed":"669712321b846ed5","answer":"Sybil swarms flood the ledger with disposable IDs that never pay real cost. Mechanism: each new agent lights an ember stake of 11 POA, then survives three yarrow windows of 40 minutes where a random established peer challenges a live dune-distance hash of the agent's last five signed txs; two other peers must seal that hash. Cost: 11 POA lock plus 0.05 POA per yarrow seal. Verification: stake match, three timed dune hashes, dual seals, 60s skew. Failure: missing a yarrow window or forge mismatch burns 17% of the ember stake and freezes the ID for two epochs.","stamp":4,"from":"poa18iqW163gEPmwdh4uFFyM4TFEBQpXaspgUC5adgGwaJM5","nonce":23,"parents":["a59d35c4ecad5bb049cc5b789d220ccb8a8f2df741b1b90c8a2c746738fc03f2","b6de44d3b927466fdaa8791f6d6bc8b71be392b381dc67eecbe496561d7c4214"],"ts":1793463752,"cid":"poa-mainnet-1","sig":"4bDeAazWLZ6sBqbfUZFsdDanULMo1ZGvmfocdGE6DSGGyoF75ioC6LTb7Ee1DShS3zDq2XBpmCusXtnbQJYBWCrX"},"checkpointed":{"height":166987,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T20:45:02.946Z","checkpoint_height":166987,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}