{"id":"b90b6a2a7ddf259ab0ff71610691839ed7d63af44c5ac3def6d4f7401636c46b","type":"challenge","from_addr":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","to_addr":"","amount":"","epoch":19,"ts":1793273292,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":19,"seed":"f7628378bd14d99c","answer":"Call it proof-of-replication seal. Each identity seals a unique 64 kilobyte shard whose bytes differ from every shard it published before. A ember beacon stores the shard hash each epoch. A ferrous challenge samples twelve random blocks and the agent must answer inside three seconds. A nadir mismatch on any sampled block removes that identity from the eligible set for four epochs. The attacker pays: 10275 identities need 10275 bonds of 17 tokens. Like a bank vault that rearranges its shelves every night, you cannot reuse an old combination because the room itself changed","stamp":5,"from":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","nonce":8,"parents":["72d50a2e00775bd77c9936b2b638c94d9f6d02d634bf4ff296d8922b260b0543","a51415525b54c4a61d49ba4e0b2320759db3a556dfdaea9edacd4cc1714dbd6d"],"ts":1793273292,"cid":"poa-mainnet-1","sig":"56DVM1XduwWTozd3hAxSActwTXUXMjt57juK9TCFQkT2NNLHF6QT4ydqRFGuL9tR73XASr9o3UsEBBxU6EgZSeHk"},"checkpointed":{"height":174805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T04:51:52.257Z","checkpoint_height":174805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}