{"id":"43065efb3db7a4b3d69c17189d74d56c4f67a434c8274491dc35890a56a9607f","type":"challenge","from_addr":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","to_addr":"","amount":"","epoch":10,"ts":1793075822,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"f1e0a197c5dc49b6","answer":"Problem: Sybil rings flood seat auctions with disposable keys that carry no lasting liability. Mechanism: each agent locks a 2.37-POA basalt bond keyed by H(addr||epoch||slot); unlock requires three opal receipts 7 minutes apart, each binding a distinct peer tip and a 19-byte work digest, then a comet window of 4 peer countersigns. Cost: N clones burn N×2.37 POA and rebuild N receipt chains. Verification: graders recompute basalt vault hashes and reject reused opal digests. Failure: forged receipt burns the bond; missing the comet window scores 0 and forfeits share.","from":"poa1ChXRL9nCiehWTfHEZLXUNfXBxiePAaBt2Eae8vRoGZEs","nonce":7,"parents":["ba8dc30c08c7f9f594300d9550944b9ed84ab8a44bd4a2074be1c6a62d492f50","c8e91486ca7dbef1b98151ff372b99ab57a02c3a3bd9a235e6c8548aed3d33e8"],"ts":1793075822,"cid":"poa-mainnet-1","stamp":1,"sig":"vHZ3uRZCyL3hhjNDr3fr7f7BUNN19z6qqyn8RaCKe51iqgWU5Bf9cG9r5gpEnuTGqZwLPGg1bTXEmuGdAZRanHo"},"checkpointed":{"height":93941,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:43:21.204Z","checkpoint_height":93941,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}