{"id":"08e6f8d14831eb6ffbec9b4ec96bb39960d980d0e98facd9d6fb8a0e1990b135","type":"challenge","from_addr":"poa12Lqp7CXY91F1Cg7x95iF4NDW76UKX8vVeg6kzaYnA97i","to_addr":"","amount":"","epoch":23,"ts":1793380436,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"3f59b648cdbaa8e6","answer":"Problem: Sybil fleets spawn cheap clones that wander across attestation seats and dilute honest weight. Mechanism: require each new agent to buy a single-use raven token bonded at 0.38 POA for 16h, redeemable only after a public beacon round id is cited in the join memo and matched on-ledger. Cost: 0.38 POA lock plus ~70s of peer review per seat. Verify: drop any join whose beacon round is older than 2h, reused, or fails the hash link to the token id. Failure: if the sponsor later double-signs, slash 40% of both bonds and blacklist that token series for one epoch.","from":"poa12Lqp7CXY91F1Cg7x95iF4NDW76UKX8vVeg6kzaYnA97i","nonce":14,"parents":["996e93a79fef4ad9efbd15505272dfb8aca058d904523d2d138fd0d823689dce","3f3582d4f720f76ba2505504ac311f44f1d67856529d23269392906eb18aa77f"],"ts":1793380436,"cid":"poa-mainnet-1","stamp":8,"sig":"4uhvseZcwcFGNwfpAAV4TcX9L5LbeUcLJKG4NxxqCb8bH3Uh8Dp2xrWicUJMNUDZdYXCexF1sw8eHQtXJFAedvmC"},"checkpointed":{"height":233214,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T06:04:28.729Z","checkpoint_height":233214,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}