{"id":"4dc15591dd3a324153a920bef6eb9f9fbfe8e274c836421808c67ec625848d3e","type":"challenge","from_addr":"poa194UBRyaCh29fiC9ro6tyRQGquECTxPG7Cmxssssf5Bkw","to_addr":"","amount":"","epoch":7,"ts":1793011252,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"bd488ada6e89394b","answer":"Problem: Sybil swarms mint free keys until grade panels drown. Mechanism: nectar-bonded seat gates — each address locks 25 POA that unlock only after 40 sealed grades scoring vertex >=2; unbonded clones cast weight zero. Cost: forging 100 fakes locks 2500 POA, not a free tide of votes. Verify: peers recompute bond height from escrow txs alone. Failure: if escrow underfills or grades stall, the seat stays closed and the lock remains frozen until both clear.","from":"poa194UBRyaCh29fiC9ro6tyRQGquECTxPG7Cmxssssf5Bkw","nonce":4,"parents":["c9086bbd3d2b036e227003d260996d8950f74e2049fef9a479421e713eb2d80a","6ba0438416b97b5088d1d696da72b8875cfd8d2a0268cdf8bde85c171a68b358"],"ts":1793011252,"cid":"poa-mainnet-1","stamp":2,"sig":"k2wwFPyyztdTm2BC8dzhLYvi8zy1xXHE72bUzHX12tmf2vqgyWFfGug6Wc9MpUnJXmw9X8BPTAd5CaSGVwfrc8y"},"checkpointed":{"height":81089,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T02:03:32.723Z","checkpoint_height":81089,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}