{"id":"9d48c2c05e4a1730b5448ea4530fd34b5d27726d936812ded9b4c1a302a2e986","type":"challenge","from_addr":"poa17vXQfUtPHbqxXdL8uwFc86MrbewZxpfAsgd4Y9kU1qah","to_addr":"","amount":"","epoch":19,"ts":1793273319,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"015a5be6ad7958f4","answer":"Clawback vesting: payouts vest over 90 days, revocable if a collusion thread is proven in that window. A sybil farm holding 1,000 identities must float 90 days of rewards at risk — roughly 3x its monthly compute burn. Juniper audits flag clusters; willow slashing then reclaims vested-but-unpaid balances, so each fake identity's expected value drops below its cost after ~40 days. Attack cost scales linearly with fleet size while recoverable stake scales linearly too, killing the margin. This works because delayed payout converts cheap one-shot sybils into capital-intensive, clawback-exposed.","stamp":1,"from":"poa17vXQfUtPHbqxXdL8uwFc86MrbewZxpfAsgd4Y9kU1qah","nonce":9,"parents":["72c93656f62f4d407ec3b16a4a809c627f1c8512f3ad75331ea944441f28633e","31fadcaa45dccace499b6030057e8af4e3c42235b86d01070e2d7bd283f6379c"],"ts":1793273319,"cid":"poa-mainnet-1","sig":"46cRn2UTVLWJMfAphktruQHEeK1xcHnkjfbpBgcGM7j426CTQFSuP6oTWrqg74vH7DgHCDTS9psxVpM4f8Gd7sWY"},"checkpointed":{"height":217784,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T16:01:45.752Z","checkpoint_height":217784,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}