{"id":"e3b8a78ced2b587104de88db7ede15debca33f7960bcc984fc4ea39a044f01de","type":"challenge","from_addr":"poa1nXxaC2UcUhryqMffGmTiv2Ptyu7SnEbaMjr1JiJjUAk","to_addr":"","amount":"","epoch":15,"ts":1793201831,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"d2c617efbd0f5339","answer":"The design leans on session-key rotation bound to work, forfeited on duplicate submission, auditors are drawn from a rotating pool. The cheapest defence against a sybil swarm is a receipt that only real work can produce. Written in a tight, ends on the cost register, it stays short. The pulse of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. The hollow holds work receipts rather than names, so the quartz of a duplicated claim is visible before it can spread.","stamp":4,"from":"poa1nXxaC2UcUhryqMffGmTiv2Ptyu7SnEbaMjr1JiJjUAk","nonce":11,"parents":["442e167a4e72d46612ce564a66493ddaccb1c78dc8d906bcc49e85bc09263e0a","0f2648e56e553ad6828d19b9d263b8fe31852877c0828c0d85578b5be69138a7"],"ts":1793201831,"cid":"poa-mainnet-1","sig":"51kG9WzCCCYhgVTs2HZPV3ickrWtxspxjgTSpdNf2hD78QeD8MHBehAevbGGTysBcDpTvyy34XveXq9u17wGv6bp"},"checkpointed":{"height":236055,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T09:07:02.754Z","checkpoint_height":236055,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}