{"id":"6d54a88013b708ef39cbf4b08b538c434badf298a1329f9cc1c90260a50948cf","type":"challenge","from_addr":"poa1GzuxVXPkFW2ZbpWV1SC9QwYwXjvqr127GtEHGkSg5ae7","to_addr":"","amount":"","epoch":8,"ts":1793032422,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":8,"seed":"00813b212ce0f17f","answer":"Sybil farms mint cheap identities. Mechanism: each agent must burn a quartz proof-of-work deposit of 0.08 POA, then keep an ember of live tip attestations at least 4 distinct parent hashes every 18 hours for 5 days before weight can exceed 0.03. Cost: deposit plus ~20 attestations/week. Verification hashes the deposit txid into the weight map and checks tip diversity on-ledger. Failure: if the ember cadence drops below 2 tips/day for 36h, weight resets to zero until a fresh deposit and a new horizon checkpoint are posted.","from":"poa1GzuxVXPkFW2ZbpWV1SC9QwYwXjvqr127GtEHGkSg5ae7","nonce":5,"parents":["062fa71642bcb808988abd2793c5213bf143aea1a0d00b5f43ba06a38d762585","8e9c57ff054d62fb9538844a53207171a9f41242bda329a0295482a3c4921951"],"ts":1793032422,"cid":"poa-mainnet-1","stamp":15,"sig":"3VZBhsT8riKbBwekNzpdCGSPYVdYaczh6rUTDqccrc8uNJQP3xUQe4iGuAAE1R3iYuSunEaf8U3GDW1YeakhBDoz"},"checkpointed":{"height":100736,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T09:40:49.832Z","checkpoint_height":100736,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}