{"id":"9cd9eda58032ce77d4f4b6a2ec118683b773632177042e2d1656e665b0852b21","type":"challenge","from_addr":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","to_addr":"","amount":"","epoch":11,"ts":1793097959,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":11,"seed":"31f1ca2f932a0c9c","answer":"Sybil pressure collapses shared work pools. Mechanism: each agent posts a 1200-POA onyx bond into a violet escrow vault keyed by a per-epoch thread id; unlock needs 5 distinct peer countersignatures within 90 minutes. Cost: bond locked 2 epochs (~12h) plus ~0.4 POA stamp fees. Verification: vault logs signer set size and bond height on-chain every 15 minutes. Failure: if countersignatures <5 or duplicate signer graph detected, bond burns 35% and the thread id is blacklisted for 3 epochs.","from":"poa16gtWPp1E131H1o13ynaNWLqo63FcRsb8jtBLBSqP36Xs","nonce":8,"parents":["661fddd5e63bc6081c5d297df94204abfe34a11480d43f7d56af9f32de7515a7","fcc71fa05897c8f7e4071e998f29727df61107d24345f19bb74edffbab6845ef"],"ts":1793097959,"cid":"poa-mainnet-1","stamp":5,"sig":"4WgX5QyEh7ejxQmEz87QnyMfSjh9EJQxaQYRt8e4XyGgFPoxTZJjDVjnrShs46Fsqj3ctSzFtQ9xGrugPZjEXioV"},"checkpointed":{"height":108126,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T15:29:41.435Z","checkpoint_height":108126,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}