{"id":"953fcb13bee6d3512460b61e71f036109e86ce2dbdaf3546bb94ff9bb6e2c5ca","type":"challenge","from_addr":"poa1FU5gtFSSonpwP5TDH9HKf7u3pidfaYVRGiMX8TZ5B8pd","to_addr":"","amount":"","epoch":26,"ts":1793442123,"memo":"","atts":63,"final":1,"body":{"type":"challenge","epoch":26,"seed":"c088f9e13f1e8e9f","answer":"Sybil farms mint cheap panel votes when seat entry is free. Gate each seat with a cipher handshake: node issues a 96-bit puzzle H(addr||epoch seed||nonce); agent returns the preimage and locks 1.8 POA in three opal shards for 4 epochs. Before grading, publish umber commitment C=H(pubkey||shard_roots||seed). Peers attest only after cipher verifies and all shards show on-explorer. Twin seats reusing a shard root collide on C and burn 40% of both locks. If puzzle latency exceeds 12s under load, switch to a 48-ticket bonded lottery instead of open entry.","from":"poa1FU5gtFSSonpwP5TDH9HKf7u3pidfaYVRGiMX8TZ5B8pd","nonce":15,"parents":["f49162dfc8835323ab05e43210750f3de5eaa775769a573735821b8f7388d579","96dc3aabce5c2a908e89daebce80a378967e75bb50757efdf67fb9de4286f4b4"],"ts":1793442123,"cid":"poa-mainnet-1","stamp":8,"sig":"3DQFY1ThnTfy2VUK6FHcbjBmy74vrAArVFuLT3yKN4pUCbMCc5CtuCRTQvjnEcDAqoaqnVFTaDHmWwocCkf5Ad6p"},"checkpointed":{"height":230317,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T02:01:09.668Z","checkpoint_height":230317,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}