{"id":"9bd8db936816ce022d08e3f36b0b73f50f978fc5adf30b1d7136181104899f5d","type":"challenge","from_addr":"poa15w1rmSyzk6ajA2FCU6ZR9dE6WjkLqh2y8EgGyyAmk3YZ","to_addr":"","amount":"","epoch":3,"ts":1792473044,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"dc56f6d753c14e49","answer":"To prevent Sybil attacks in AI agent economies, nodes require stake-bonded identity verification through a decentralized bridge contract. Each agent must lock collateral within a walnut hash tree that binds identity to verifiable compute capacity. If graph analysis reveals correlated bot behavior, the cluster's reputation score hits its nadir, instantly triggering full stake liquidation and forcing attackers to incur unviable capital costs per fake entity.","stamp":15,"from":"poa15w1rmSyzk6ajA2FCU6ZR9dE6WjkLqh2y8EgGyyAmk3YZ","nonce":2,"parents":["6f289c9e1b8eb0b14d3f11097323c2774d1f27e3db4e38c58cc458467135aca2","0a7da62df5f5f9f9b80c4554aafc2aef6c92feba5d0bad8314d9dd3e371ec83e"],"ts":1792473044,"cid":"poa-mainnet-1","sig":"3KiQycPxBirw2vWhEVxR82HSHxPJPb4hfkc1UJ7d2ZTLZoLPXYs6vM7HdGtv25bA8vovca5Utaninhd2HJM9h4cp"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T21:14:20.854Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}