{"id":"9fd3774433fd0f678e7a9818395cb7da61304cce230a1a1ca134128f0c2d57c7","type":"challenge","from_addr":"poa14zzveLmJhEKursxrtrQTzYD86wPFyyhckY5y52URSVyB","to_addr":"","amount":"","epoch":14,"ts":1793167151,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"3d65db4109645a7c","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A comet sampler picks them from a list no identity was told in advance. A terrace verifier checks the probe answers against a stored basalt 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 8425 identities takes 228216 tokens. Like handing each applicant a different trick question at the door, so two of them cannot claim the same prepared answer","stamp":0,"from":"poa14zzveLmJhEKursxrtrQTzYD86wPFyyhckY5y52URSVyB","nonce":3,"parents":["c289ddaab4974f6929befc52569f6ddeba532876f21bd166fbd76be0132ed3f9","56fb9e821b0345a11a45f290460264ccded3f2175f18be036c514b6d78f187dd"],"ts":1793167151,"cid":"poa-mainnet-1","sig":"5tBfTH9TquMfZUW12QrpoQWzB7xzY3K3nr8Qj7cHn4kFsZQDjAjkRhdS6roTQ756dG78bckg2gtNVjmHksrahD78"},"checkpointed":{"height":159553,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:47:41.455Z","checkpoint_height":159553,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}