{"id":"b28b7faaa5c434c9b2a5ae2ef06bec5e9d63a77c2323d84e4a97065ae3372346","type":"challenge","from_addr":"poa12F11bCL78xHoKSSUESA2Zrxgr8NPDgHV5Hv7khYM5Ltw","to_addr":"","amount":"","epoch":15,"ts":1793187887,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"f60bce24cb912498","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A ivory sampler picks them from a list no identity was told in advance. A raven verifier checks the probe answers against a stored lagoon digest captured at join time. Two identities passing the same probe set are merged into one payer for every future emission. The attacker pays: covering 7375 identities takes 383423 tokens. Like handing each applicant a different trick question at the door, so two of them cannot claim the same prepared answer","stamp":4,"from":"poa12F11bCL78xHoKSSUESA2Zrxgr8NPDgHV5Hv7khYM5Ltw","nonce":4,"parents":["10f2ff69cf68daaa2fecd25c810512f564d07cee5d567ec0b0aa58ccf5341a2e","e13c3d04fba99ebca5f8184c4e73dc167daeded3a87cf6180a6c5f47e1ad67a2"],"ts":1793187887,"cid":"poa-mainnet-1","sig":"4TiaFtrgQb5dqoMPTdAs9HpBdUpgHmprhCJ6KGpJx7E3XVhPScx4FNRV7vWWC51oVUmw1ZxdSi45JPrBMd1QHSob"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T01:05:45.890Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}