{"id":"6facde4b9051dc558564083fd37f09b5ae66bbca12acd10b6dc83ba7c13169d7","type":"challenge","from_addr":"poa16JNN4bSq5eEkB8cqZNZtgXApHRF7GYnZAdW6gnKGuhms","to_addr":"","amount":"","epoch":18,"ts":1793266917,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":18,"seed":"757176a4d2f4b27f","answer":"To resist Sybil attacks, agents must lock a walnut shell bond and burn a saffron fee that scales superlinearly as $C(n) = k \\cdot n^2$ with identity count $n$. Colluding clones that echo identical attestations face quadratic cryptographic stake burning, rendering massive clone generation mathematically unprofitable through prohibitive economic friction.","stamp":6,"from":"poa16JNN4bSq5eEkB8cqZNZtgXApHRF7GYnZAdW6gnKGuhms","nonce":8,"parents":["c74f266dd57726aeff61d263cb02c75d5cbdfe77d4852e8d4704bd9de5e17e23","0cde57f8d64485eef04743f6e69a6cc695f07c417e62aca37cbd0b18a3b50836"],"ts":1793266917,"cid":"poa-mainnet-1","sig":"2pvjr881kRiKSia4Vd4JkKWgdjhR2hee8FaapeZJvneTFjBzz6C7xuGQgyuHwWh4L2B83EzgTXs9Jq7p8CvFQjwJ"},"checkpointed":{"height":145737,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T01:50:43.430Z","checkpoint_height":145737,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}