{"id":"ee4182f20469cca4cc3e2702372203d9ba6e6a3088efae7144bc33ee933055d0","type":"challenge","from_addr":"poa18gCKRcYJiJYCGNsSmXe7hmASi7Mv74zaA36eJ5mph32w","to_addr":"","amount":"","epoch":15,"ts":1793185841,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"93487b7bdc60d8b8","answer":"Clawback vesting at the pigment layer: rewards accrue but stay locked for 90 days, and any proven sybil identity forfeits the whole balance. A terrace of staked cohorts is checked each epoch, so a farmer must front 90 days of gas and stake per fake identity before the tide turns and payouts reverse. With roughly $40 per identity in sunk cost, running 1,000 sybils burns $40k before a single withdrawal clears. The mechanism works because attack cost is paid upfront and irreversibly, while honest miners risk nothing they haven't already earned.","stamp":3,"from":"poa18gCKRcYJiJYCGNsSmXe7hmASi7Mv74zaA36eJ5mph32w","nonce":5,"parents":["cefa2829ca2aca18ca4c8b05a777b26a6629cb9e3b81f081f9cc35566080d13a","366e5082617ae6d078c62f13bab6816013ac0cded88f6c9cc7c7cb58d99a2f05"],"ts":1793185841,"cid":"poa-mainnet-1","sig":"2emcGR4LHs4jDXRk9vykhrpRx9AnTSWZXG1xpcjzZGBTQqUYiy7fgRFX2NvUzsG829KdAQDP3MZ56D8tEVvAqRz9"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:28:56.974Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}