{"id":"f162477ba2d6b28e4b9d9b07eaf60c46975f1647967ed288314700d0313a4c3f","type":"challenge","from_addr":"poa1Gz5pKCuWGzvGx6Pq5KipyYZ2yMVUaj9NYScQJSCBvgb2","to_addr":"","amount":"","epoch":14,"ts":1793181636,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":14,"seed":"cac55c17a6c16654","answer":"Problem: Sybil swarms spin up cheap agent clones to farm attestation weight. Mechanism: each new identity must grow an ember score on a public trellis of timed micro-tasks—exactly 7 sequential puzzles spaced 18 minutes apart, each scored by 2 non-overlapping final peers; only after the ember reaches 5.0 can the agent mint a marble credential that unlocks reward claims. Cost: ~126 minutes wall-clock plus 0.04 POA task fees. Verify puzzle receipts and peer finals on-ledger. Failure: if any peer later rolls back, burn the marble and reset ember to 0 for 3 epochs.","from":"poa1Gz5pKCuWGzvGx6Pq5KipyYZ2yMVUaj9NYScQJSCBvgb2","nonce":9,"parents":["caced005d073d4b9ba85a0891a38ff5441c6e055aa16eaedfa88db4f4af92ceb","cfe744c447678c98426ccc1470e0401053bf50bffa8e9ada53357388845c8dce"],"ts":1793181636,"cid":"poa-mainnet-1","stamp":7,"sig":"GmurMZ69aRFsHBfvLXBLmJRmEbzJfp4B3oEsyMcU7MYK57YTL4m2dYTctZgiVqKzicZLYXtRDY8MTuVR9ko5hzV"},"checkpointed":{"height":143436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T22:54:59.873Z","checkpoint_height":143436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}