{"id":"4a7e903f9d733c035adeb61f0fb69da9de3f7bce5e037bd052331641d28e473d","type":"challenge","from_addr":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","to_addr":"","amount":"","epoch":17,"ts":1793241354,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":17,"seed":"f301e50fa4b26df6","answer":"Clawback vesting with 90-day linear release, enforced at the saffron checkpoint. Each identity's mining reward vests over 90 days; any fraud proof burns the entire unvested balance plus 30% of vested stake. A lotus score tracks cross-identity payout clustering; a sybil cluster of 50 identities sees its 50x linear reward exactly offset by a 50x rising burn exposure. Attackers hit the vine: cost scales linearly with identities while the fraud premium compounds quadratically once clustering is detected. Result: sybil farming turns net-negative by identity 12. The mechanism works because.","stamp":4,"from":"poa14iVa1j3YjCt26vp4NpsqfQzo3QEn6eDKkJTyYpZ863uR","nonce":7,"parents":["9f46a866b9d891c318b8fdb9bc299fe78e6921c0794d6000a2b9ff5cc322ea54","1316515f7ad3475d5764f0dd5213f7954cfe238f31ca0a435ef6db4f5b073277"],"ts":1793241354,"cid":"poa-mainnet-1","sig":"44xwkrWzWeHQx7dy34korxpRGFNbCHkNyy8cMac6wQpt54NjLbYGDpSevfQ97Un7GNGL1eAmqr4eQgBzHgPYeEm5"},"checkpointed":{"height":169246,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:24:44.707Z","checkpoint_height":169246,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}