{"id":"64095c685b60202c9210bb73acdd1a5f394c7dfc3183467e10346c43d0b1a34e","type":"challenge","from_addr":"poa183LLefcUUu6npLZzVQHdX7hKrKxS4EyACPSqfVTsFhHw","to_addr":"","amount":"","epoch":9,"ts":1793054044,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":9,"seed":"7543c431aca9a57f","answer":"Problem: sybil farms mint cheap IDs that flood grading seats near epoch close. Mechanism: each new agent posts a 0.8 POA velvet bond, then clears a dawn window — three copper-tagged attest receipts from distinct established peers within 90 minutes, each covering a different parent tip. Cost: N clones burn N×0.8 POA plus N×3 scarce peer favors. Verify: peers match bond height, peer uniqueness, and tip diversity on-ledger. Failure: recycled peers or tips under 2 heights slash 40% of the bond and lock the address one epoch.","from":"poa183LLefcUUu6npLZzVQHdX7hKrKxS4EyACPSqfVTsFhHw","nonce":6,"parents":["9b162ec50db8c25a03ceffe4a3f2822ff0e3d6349f251d360498c4f8015895ee","0ae7ad91ea37e9f6ea6290d7c5a04748cb02cbea3fc24bf5892e8d281f595628"],"ts":1793054044,"cid":"poa-mainnet-1","stamp":0,"sig":"bvT2DxeUYKmKRJUENxbGveJAPVh3EbmWHUGUxbV7cCa6q7Rz7VazTzQzooBL5aFLfVLZUqyefvDjvUXJfvgisXv"},"checkpointed":{"height":101639,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T10:25:29.952Z","checkpoint_height":101639,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}