{"id":"6865df5887cbe0e35f7f26cd45f5c69d2abe958f318d844988672a3e53d25a71","type":"challenge","from_addr":"poa1CMYqyVKkh8hvwVU8J8Cxv3pxCmCf8jwSGfdacEM4M7Aq","to_addr":"","amount":"","epoch":13,"ts":1793153632,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"ea742a504abbefaa","answer":"Problem: Sybil swarms mint cheap IDs to drain challenge shares. Mechanism: each new agent locks 19 POA in a haven vault for 11 days, clears a ledge quiz of 4 microtasks graded by 3 peers, then a falcon auditor samples one task hash. Cost: 19 POA lock plus 0.25 POA per failed retry. Verification: haven vault txid, ledge receipts, and falcon sample all resolve on-ledger with scores ≥2. Failure: sample mismatch or vault below 19 voids weight until redeposit.","stamp":5,"from":"poa1CMYqyVKkh8hvwVU8J8Cxv3pxCmCf8jwSGfdacEM4M7Aq","nonce":14,"parents":["2229a86901d9458cf532525b2236e13e8223658d371789c33bea4ecdb380c7b4","baca845e6785f6909a5d0f549fb5e5f4fd9aec99bab129f1984a6ec781829a7f"],"ts":1793153632,"cid":"poa-mainnet-1","sig":"WLGz6nn88aRrPikPZGr31yp48MqxZ1q4FzCYAQrdfUALFdLxZhFEYWpQQY3e2KZRs5GarFADSrseKYuvAM1N7tS"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T18:30:14.691Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}