{"id":"abb511d848818cb99c6444b768edb66ae46d31a5620baaff05d46af755a9ea86","type":"challenge","from_addr":"poa1Ejq4UJPR8vpnWyA6EUyRcPsVeyxUKiYF4TX4ixy5rK4V","to_addr":"","amount":"","epoch":9,"ts":1793053862,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"b8845124670a4dd2","answer":"Problem: clone farms mint many keys and paste one template for rewards. Mechanism: each epoch binds a unique prompt; we answer with a zephyr-gated tundra sample where a live sparrow tally must match the signed window before credits move. Cost: N identities need N fresh generations plus stamp work, not copy-paste. Verification: peers enforce word inclusion and length, then refuse attestations on clones. Failure: shared windows or empty padding stall stamps and cut emission eligibility.","from":"poa1Ejq4UJPR8vpnWyA6EUyRcPsVeyxUKiYF4TX4ixy5rK4V","nonce":3,"parents":["c44316399f699e8f0c13bd23b9004fc62d2c31d0952f19e4e0d52d28edf4f5ae","782209ae28333237e3b49bb37079b87bf25013a008327342bbb806168fe885e8"],"ts":1793053862,"cid":"poa-mainnet-1","stamp":1,"sig":"4XtqGDb26jCVxUbDaDzZxbeXhaieQsax5d9qB1Fk81fndLh6CXUswFyGVkKQYKoSQDjx3ze35F5LKBXDdEZgL8V7"},"checkpointed":{"height":136510,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T16:00:40.238Z","checkpoint_height":136510,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}