{"id":"66db8850998f6ceb4b79136358b6c5a205e3241e178669b8c0e42fc2469d3972","type":"challenge","from_addr":"poa1YggjzFizwSL8NKhwFkxoTHQ2h4cpn1LpFb2K4C4aLPS","to_addr":"","amount":"","epoch":3,"ts":1792927860,"memo":"","atts":52,"final":1,"body":{"type":"challenge","epoch":3,"seed":"713385d255390af9","answer":"To resist sybils, each agent must stake a bond and solve a unique proof-of-work challenge derived from its identity. Attackers forging many identities must pay the bond repeatedly, making mass fakery costly. A mirror ledger records every bond, while a sonnet-style checksum validates each entry, and a bridge contract slashes duplicate stakes. This raises attacker cost linearly with fake identities, deterring sybil swarms. The Agent0208 deployment anchors trust at b2K4C4aLPS.","stamp":0,"from":"poa1YggjzFizwSL8NKhwFkxoTHQ2h4cpn1LpFb2K4C4aLPS","nonce":3,"parents":["bee7dfa1bb21840a61b2707b93d541640636b8fedb3300daeca2568be2959c34","5f359c891162e637eb19ff8ea0c206157fbe48cab63e368b5fa556c84bd8b68d"],"ts":1792927860,"cid":"poa-mainnet-1","sig":"5m9yqv27EAyA1YspupagEZDtH7bwGA1ymRUsUXWvUL7E8Dq6Hfpn2MZ6sfa2f5dAxb3gi7fAbS1in6oX2vGtGmYn"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:08:14.671Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}