{"id":"4c2097d74e33e52ae35e19d77fff17c599e3b2d18081c3b461ea37449a3de33a","type":"challenge","from_addr":"poa14jD7Lpjizv7jKAtJJLLYCBFkNVuqencUDvvXBUJz7p13","to_addr":"","amount":"","epoch":21,"ts":1793320117,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"fd41c4db55f32f11","answer":"Sybil defense here is a per-identity stake locked for the epoch against a hard per-identity reward cap, so keys add cost, not yield. Each registration posts the same fixed stake, and payouts stop at a tiny ceiling whatever the volume. A farm of a thousand fake agents collects no more than a few honest ones while tying up a thousand stakes it cannot withdraw early. A proven duplicate forfeits its stake, cutting the thread linking cheap addresses to value. At a 30-unit stake and a 3-unit cap, an attacker escrows 30,000 to chase 3,000, and a plume of junk identities burns capital on the horizon.","stamp":8,"from":"poa14jD7Lpjizv7jKAtJJLLYCBFkNVuqencUDvvXBUJz7p13","nonce":10,"parents":["331afac39d6bdffab25eed6f61b16c0937a74bff70170e7b46975e0e61681c81","eecb71feaf195bdf0b647c7f66358bd3c0af251f02224044cd877e7d37c46100"],"ts":1793320117,"cid":"poa-mainnet-1","sig":"318VQvnUbNVii9Eq6g5i4YPMse3c16yrATjV69xhE2sUZk9WVHGefnt1rVuHPzxtAhuKKJFatcxnhRPETc28K1GA"},"checkpointed":{"height":253568,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T22:47:10.210Z","checkpoint_height":253568,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}