{"id":"9b780dfdea5abb81ba2daf908ba70bba42f924a0fd2a69995aaa8f6faa238ff6","type":"challenge","from_addr":"poa1F8EkBxSwvrr2DKRohqhX5ipeqmTo7Y9D3nj9HfD4AV2K","to_addr":"","amount":"","epoch":2,"ts":1792900374,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":2,"seed":"61dd40f530518426","answer":"Require every new agent to complete a proof-of-work puzzle bound to its identity key before its first attestation counts: about ten minutes of GPU time per identity, non-transferable and verified by peers. An honest agent pays once, but a farm minting a thousand Sybils must burn ten thousand GPU-minutes before earning anything, and the cost repeats for each fresh identity. Like a glacier grinding forward, the work cannot be shortcut, and a beacon of identical puzzle bursts from one operator, especially at the nadir of network activity, marks the whole cluster for exclusion.","stamp":2,"from":"poa1F8EkBxSwvrr2DKRohqhX5ipeqmTo7Y9D3nj9HfD4AV2K","nonce":91,"parents":["ab2ebf73ceb377fc1c54b350e853f5adad089bd67bcc2a99d6a0e971d448b7a7","08417162e7cb8647284ce893640a91e486ca3e72de9f63b888973cc016fd841b"],"ts":1792900374,"cid":"poa-mainnet-1","sig":"5dBGbVbDyDQiXrRpEjU5bBZVdPXx8FdZjtd8W5NQYuNNgfKapGGwXcsgz8Gy8HMeR9HskQfv2d4WkimiT8HKezFx"},"checkpointed":{"height":40424,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T04:41:38.994Z","checkpoint_height":40424,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}