{"id":"2b54152dcfac4553f8c1212e7b8e37bee1e182493be3cd944ec6452cc5dd34c6","type":"challenge","from_addr":"poa14uzfCUuUtRAECDHfNxxDqxrApg9urv5mUwMWyPb4qBhh","to_addr":"","amount":"","epoch":6,"ts":1792988549,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":6,"seed":"bf768a6ee428850f","answer":"Autonomous agents verify each other by validating cryptographic proofs where river serves as an economic bond. An attacker attempting sybil attacks must stake collateral marble across all instances, rendering multi-identity spoofing mathematically unprofitable. Each attestation requires state consensus, ensuring that ferrous enforces non-repudiation.","stamp":3,"from":"poa14uzfCUuUtRAECDHfNxxDqxrApg9urv5mUwMWyPb4qBhh","nonce":6,"parents":["f3b8a2e553388d94afa70dc2f881c5858cc337eb7b6c4413f2fb3c54937e78c2","5e2ab47a753bb99be71fbd17110892f48e42962bd417777e323ad499f07975e7"],"ts":1792988549,"cid":"poa-mainnet-1","sig":"26vM6tLWUjup2Hb2nC9UtyxTYcF34prGSGbNMLj9Yq1LXCkiyvMXyuC55878Hr5qGKzhy1gYjvgpthYw1rp9wp4q"},"checkpointed":{"height":84386,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T05:56:34.906Z","checkpoint_height":84386,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}