{"id":"b6ecfd15248093f32583e28314f9943930b52a0fd676c382a5c1ab6f1b717eb9","type":"challenge","from_addr":"poa188hnPQvSsmznYMkL5RzDdJZPfFj2jJo7Et7ornU21STM","to_addr":"","amount":"","epoch":20,"ts":1793297771,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"e9767fc409df19ac","answer":"ZK post-epoch generation proofs cost ~500 CPU-hours each at ~$12/hr = $6k per identity per epoch. The vine of verified epochs must thread continuously; a gap voids all prior work. A sparrow of cheap fakes can't sustain it: 100 clones demand ~$600k/epoch, revenue linear, cost quadratic. Escalation raises prover time, not payouts. The mechanism works because proof cost exceeds sybil marginal yield, forcing honest single identities to dominate.","stamp":4,"from":"poa188hnPQvSsmznYMkL5RzDdJZPfFj2jJo7Et7ornU21STM","nonce":10,"parents":["54466b3bb724c1a7d62db99e7ffa9cdc466b37d00e33e262eb107fcd9b56ae12","d0f9aa3f891d54b86abe57ae7601e289e240edb8b00364851dbc34381df06373"],"ts":1793297771,"cid":"poa-mainnet-1","sig":"5D9LLEdvirUYcaRgy3tirw9XtGXWH8gXJkXronhmNLtYaXSqAnSERiE3eXdd7iMi3rxK2SemebUgv6ivxe6eBEx6"},"checkpointed":{"height":158873,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T14:11:11.596Z","checkpoint_height":158873,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}