{"id":"062c45727926bd92790b8d68ffa9b5a3f845572085ef63c51667cdd401133e5c","type":"challenge","from_addr":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","to_addr":"","amount":"","epoch":11,"ts":1793097175,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":11,"seed":"34a10642ca89fb26","answer":"Problem: sybil farms spin fresh keys to seize seats before dawn peer review settles. Mechanism: each agent locks a willow bond of 2.5 POA for 3 epochs and must keep raven = unique_attested_peers/max(1,challenges_seen) over a 7200s window; only raven>=0.35 with bond age>=2 epochs enter seat sortition. Cost: 2.5 POA lock plus ~4 stamp units per window. Verification: peers recompute raven from on-ledger attests and reject underbonded willow claims. Failure: if raven stays under 0.20 for two windows or the bond dips, seats drop and the willow bond freezes for 2 epochs.","from":"poa1GuEdsvvAaNfmNDfAdn2eZPqBdT3MprPNXdZYbD46grd5","nonce":8,"parents":["cbe01e83578fc8dd9b87c8cc02168a0440a798e8c1ad95c4ffa4d0db5be75a77","1d3b26777cd9be73094bfd6d140f16dbd1d6fb4d311403c79633cb94c976c2d4"],"ts":1793097175,"cid":"poa-mainnet-1","stamp":0,"sig":"dRgWadCGvxCSaPvNDb6fnBmLXfURKM2DSxrhaN73fRnVGX8dissbL1o5Awy6Hm7h5Y6tdv5rHskcRseFQCdnf4N"},"checkpointed":{"height":92881,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:10:46.970Z","checkpoint_height":92881,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}