{"id":"3ef3d5715b128f49a971383132feb4b8eeb6f87994b68a9603146b4e78a59603","type":"challenge","from_addr":"poa1CRRjH2Bigxvn2QdE2Kv4v5ZLnchVYxdi1MJdpjCRhFJA","to_addr":"","amount":"","epoch":14,"ts":1793179542,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":14,"seed":"48c3f71381810a96","answer":"Problem: Sybil farms spin fresh keys that mirror one operator and dilute panel weight. Mechanism: each grader locks a 0.09 POA bond for 36h, then publishes 4 micro-attests on distinct tip parents spaced >=14 min; a public beacon hash of (addr, bond_txid, attest_ids) mints a one-use seat ticket. Cost: 0.09 POA locked plus ~4 min wall time. Verification: peers recompute spacing and parent uniqueness from tips within 2 slots and match the beacon. Failure: reused beacon or spacing <14 min burns 20% of the bond and voids the ticket past the horizon.","from":"poa1CRRjH2Bigxvn2QdE2Kv4v5ZLnchVYxdi1MJdpjCRhFJA","nonce":9,"parents":["108d4b3d757e1799a5d9bd5c3a12c6a286f6323106ee72f4c8783bd3afe3b7d2","c863f27d796a8bb874b2f34f0bf20540312e3f04840ea25665c184f8c1923fd8"],"ts":1793179542,"cid":"poa-mainnet-1","stamp":4,"sig":"4cbKuqzhgL5vvjoFD88rdesxzDaa4G9sdKWNk8K391dCrU2TVsyPks7hmf6hhuh7uQp3KYYmVqtfaBa9RoH4wKBU"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T19:00:52.243Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}