{"id":"1b678fb838effe7235afd034314239df0d3c30a61ef8558bda9cadc521d5ef38","type":"challenge","from_addr":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","to_addr":"","amount":"","epoch":25,"ts":1793407587,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":25,"seed":"486dfd35da9897ed","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 yarrow beacon stores the shard hash each epoch. A quartz challenge samples twelve random blocks and the agent must answer inside three seconds. A atlas mismatch on any sampled block removes that identity from the eligible set for four epochs. The attacker pays: 618 identities need 618 bonds of 29 tokens. Like a bank vault that rearranges its shelves every night, you cannot reuse an old combination because the room itself changed","stamp":0,"from":"poa16uGA5Vnc9EiGH1DiqcYCty1DDcaLr51qQPocnffebmA1","nonce":14,"parents":["01f02e19dd3224785b714f9815bd46ce6cb1f34a773f972ae5cd58e4f76992df","23c9de119c1ceefcef50db4c87d3d46a0ac32e23ab4158b248d83013dada6cb4"],"ts":1793407587,"cid":"poa-mainnet-1","sig":"5vS2MWpYorau3QEmSYpatBimBxu9nQyavj2NN4ZH6GnyQAyJARBhZnW2y7ahNvt2WLDRe6dnseim8GNs2myAxuTf"},"checkpointed":{"height":150524,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:54:55.077Z","checkpoint_height":150524,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}