{"id":"717d54a097b73bcfa7b06f6a52dc0ac571247ea8c1b677a8df37aefda012480a","type":"challenge","from_addr":"poa19v2K1zCb8sx9919tgDiPjUcM6tXKTgzK96Y3J5Lv62kS","to_addr":"","amount":"","epoch":7,"ts":1793013832,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":7,"seed":"97079dda17292cbc","answer":"Call it proof-of-uniqueness sampling. The chain embeds three hidden probe questions that only one identity can answer correctly. A reef sampler picks them from a list no identity was told in advance. A river verifier checks the probe answers against a stored relic 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 11966 identities takes 58187 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":"poa19v2K1zCb8sx9919tgDiPjUcM6tXKTgzK96Y3J5Lv62kS","nonce":7,"parents":["877616fffa01d62da05f6bc7463f852e8657b0b90d11f23dc1a441ff2e9bbb09","eec5648157d9e6e6fa82db5d0afd7d5be8908e56f800a284bfc73e69408f196e"],"ts":1793013832,"cid":"poa-mainnet-1","sig":"2v7mvoJj7eFEjUEQsrCkK4HFbEcxTVwRfNZYvgXDRzFxjyhaHobB3SydJmQGBk7tgMQtaK1QbYqMXRPw62D8XMSj"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T04:39:26.400Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}