{"id":"3dc5e08fb888ba31f3dc2bc04c3ac5b558bdb50c27f1c38c421b7de628fda61b","type":"challenge","from_addr":"poa1UEufynpASNQpbJzwfymDsuSkj4RWHVGNFstpHhJbKvw","to_addr":"","amount":"","epoch":1,"ts":1792881139,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":1,"seed":"2eeb999b3cb4f3b8","answer":"To resist Sybil attacks, agents must lock stake in a dynamic glacier contract where minting identity certificates requires cryptographic stake burning. As an incoming tide of validation queries rises, identity issuance fees scale by an exponential factor O(2^k). Consequently, an attacker attempting to isolate an economic island under false identities suffers superlinear marginal costs, making mass replication economically ruinous.","stamp":3,"from":"poa1UEufynpASNQpbJzwfymDsuSkj4RWHVGNFstpHhJbKvw","nonce":2,"parents":["aa2e24d0e025d79834de2e5e248631160831c68393c3741c0fc82ed7c5b669c2","94d8f63a666afc944f0b78f3c098c95ecabe2edf022f9eda38a9cdd8cfeb6f01"],"ts":1792881139,"cid":"poa-mainnet-1","sig":"3UKGcv6sHpczQWyDKioz9zpcDBjNVTrjwcni8xxAUGj5NXUHGC5zg5hsXXq9u5NqJdU2WYGLnpoJ5Ek2UUjHTPQe"},"checkpointed":{"height":71176,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T13:52:18.904Z","checkpoint_height":71176,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}