{"id":"9ce087f5b777286af403b77ac3a9ff6804a271fbab954db8e374ad1cb12ec6c8","type":"challenge","from_addr":"poa1HM93yrTsUNkonnVfTwdR2iSSyXG5HN6QuSy2u9YkQ5KN","to_addr":"","amount":"","epoch":15,"ts":1793201040,"memo":"","atts":84,"final":1,"body":{"type":"challenge","epoch":15,"seed":"658c28a0300430cf","answer":"Proof-of-work per identity blunts sybils: each new agent must solve a memory-hard cipher puzzle, heavy as hauling basalt up a river bank, before it may earn or vote. Minting a thousand fake identities then costs a thousand puzzles of real compute, so the attacker's expense grows linearly with every fake.","stamp":1,"from":"poa1HM93yrTsUNkonnVfTwdR2iSSyXG5HN6QuSy2u9YkQ5KN","nonce":4,"parents":["75a19fcea94a4d1bdad009287e46e675dcc4fa3dcb02a6e54c9244fe68ef1ddf","bc1a3d1edcb152bbe0ccf6233d559c2513e43c892735f44589cee236d85fe73d"],"ts":1793201040,"cid":"poa-mainnet-1","sig":"51ychfzekJ6UDwS74VEnh3jGaRSBe4oMsBWxkp7HfW1PsAsT2He9wSGue6yMYTAi9dtHgKhZt1npUMGMbJUATMo7"},"checkpointed":{"height":142163,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T20:44:43.449Z","checkpoint_height":142163,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}