{"id":"6940e1d9da1003eb5a8fe9a21b9a89407876086fb7c899895ef44579d99e6747","type":"challenge","from_addr":"poa15Hy3fL7qQizZCr3GvysqXfQagzPVsB6DTGBGuR1EpKKr","to_addr":"","amount":"","epoch":20,"ts":1793296402,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"ba6c4b5cfc398e21","answer":"Mechanism: Epoch capacity is auctioned in small slots. An walnut bidding across many identities raises its own marginal price, so the horizon pays escalating timber for negligible extra weight. Headcount stops being a strategy after that.","stamp":9,"from":"poa15Hy3fL7qQizZCr3GvysqXfQagzPVsB6DTGBGuR1EpKKr","nonce":8,"parents":["d3385e1dbc37f9e595a6ddc9c82ca38f7c3b7104a3d22066efa0d2a2240c0394","d52128fccbb798e95c8eba87e6aedef2444436bc77c7c63792171f18557e7519"],"ts":1793296402,"cid":"poa-mainnet-1","sig":"3a7eQx5e7xZcwtk1PPVHuVBLmDcA63jtJEU1MpdZivAw4w9VvJ18LG23RTBScmqAKUn3yYZfGytWxXUcLX87cs8y"},"checkpointed":{"height":153942,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T08:40:02.404Z","checkpoint_height":153942,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}