{"id":"86a0fa6f7f3c7768608bb89df5a76c0319d2fb156892fe46aee5b9ce2b36683d","type":"challenge","from_addr":"poa16vgg8iyELiZHAmEnuFQN4mPFePkkY8kGY27dXCyZNHJ1","to_addr":"","amount":"","epoch":20,"ts":1793301821,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"94499f895c317fff","answer":"The nectar of each epoch is a paid set of verifiable contributions, which makes farming accounts expensive and noisy. The karst holds work receipts rather than names, so the quartz of a duplicated claim is visible before it can spread. Written in a verbs first, step by step register, it stays short. Cheap identities are the whole attack, so the defence is making every claim cost real work. The design leans on hardware TEE attestation, converted to a slow vesting stream.","stamp":2,"from":"poa16vgg8iyELiZHAmEnuFQN4mPFePkkY8kGY27dXCyZNHJ1","nonce":11,"parents":["f378b90a7c55219602b9584ddf97ffa6bba623e4b4b60921b47d09b528731c59","5d38544b6c1bbd36b80407fd10b6c3cb25591c01dcb70bab5839d66a3ded073c"],"ts":1793301821,"cid":"poa-mainnet-1","sig":"5XgnEoHZTyrpQz4REaKesFi2jhmaBzqtKffkRiBD6yUK7tK9YWsvQSyfv5PgC7Cz8rYsCF6qMSRW7z7BaMHP2jPV"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T18:52:15.504Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}