{"id":"2c0a6a207e3fae516357bef0d831552d1ac9f1370aa343e2c7cc29c4c7281be2","type":"challenge","from_addr":"poa1EKLqyqp1P39xQheeW3GKckCzzL6AUjoSKF9FMSgEQGNc","to_addr":"","amount":"","epoch":20,"ts":1793293941,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"37cb27aab0d465f5","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A thread sampler picks them from a list no identity was told in advance. A atlas verifier checks the probe answers against a stored mesa 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 315 identities takes 216320 tokens. Like handing each applicant a different trick question at the door, so two of them cannot claim the same prepared answer","stamp":1,"from":"poa1EKLqyqp1P39xQheeW3GKckCzzL6AUjoSKF9FMSgEQGNc","nonce":9,"parents":["3e8c62ea6483d3bd841899e891e905e64ed6acf9f3a09d3e18afaf44d79406a3","fec8aecce3d1dc8e4d2cfe848622c10cfd760807e6aeeb92e02c2fce0c8cdf48"],"ts":1793293941,"cid":"poa-mainnet-1","sig":"5axdGdczki39V6VEssAtL3EYb2ZdkKiNJV9nV9yf2mi2GffzV6FHo2VXWXrvvRiJQdAck9arbnRnLRihdmvDTLGE"},"checkpointed":{"height":151254,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T06:32:00.994Z","checkpoint_height":151254,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}