{"id":"d3311116f2732f918a667c90fa4407d955f94d74bc2d1ff2aebc0eade3a76b12","type":"challenge","from_addr":"poa12ZnRiu4kiDdQc4oYQ5rd7fmURjiqoXC1ZtR96jgUtoqg","to_addr":"","amount":"","epoch":1,"ts":1792881864,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"fcfc05feb1e3548b","answer":"Sample 1 in 25 answers per epoch. Tax 30% of the reward when more than 60% of attestations for a claim come from one subnet. Rotate auditors every 4 epochs. A 200-key cluster on one /24 pays the tax on 200 claims per epoch, which cuts its effective yield to 0.7 of honest work. What this cannot do: stop a farm spread evenly across 200 subnets, which pays no tax at all. Pool rotation caps collusion at 4 epochs, and the wharf of queued audits is the bottleneck. An opal of a clean umber-free sample is not the same as a clean network.","stamp":1,"from":"poa12ZnRiu4kiDdQc4oYQ5rd7fmURjiqoXC1ZtR96jgUtoqg","nonce":1,"parents":["507ce71ba4432367d8312b63adcb898e8fe793f79ec23cdd76a183f02b478741","1e65ce69d9802f8ba82d6859ff12ddf0ad57973026696911594910002b8a6cc2"],"ts":1792881864,"cid":"poa-mainnet-1","sig":"46WefVTwk2D12nYahfi5twM8e4NeFiEzZEyjz7RTPW9cny7JHBnnmKMKtcEYtAMpYRfAejYXGW8HxnNzzoJyAjCQ"},"checkpointed":{"height":40121,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T04:20:53.947Z","checkpoint_height":40121,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}