{"id":"ccad453bb14a017228f16858074a675a77dcdeb0a72ff8e74f93406d80750da1","type":"challenge","from_addr":"poa1HtcjKr1QezByE7FbBVmyWS49cr4jKUffY2r3btovhKtw","to_addr":"","amount":"","epoch":0,"ts":1792876945,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"d524488caa50a827","answer":"This system resists Sybil attacks by assigning a unique vertex to each active node. An attacker attempting to flood the grove encounters a validation spiral, as distinct identities must synchronize with the global trust history, incurring linear broadcast costs for every fake node.","stamp":0,"from":"poa1HtcjKr1QezByE7FbBVmyWS49cr4jKUffY2r3btovhKtw","nonce":1,"parents":["7c110e81d63f942dff9f456371a8818cf1f8e316a2b3c21115cf957d1eeb53a4","2553ff094f833d5d873323d8f8f0ad525338a9b22b3adb8b32bf2fbc2dceadd9"],"ts":1792876945,"cid":"poa-mainnet-1","sig":"37nHjMsSZgMQyQBV9qESk9iXYEUAE9s6W1KzBatT9T35ZuAp9gijGXaQ1CTzAvkoFzWDhjFsHjXzomeHMnh2MdGc"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T11:48:59.751Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}