{"id":"84d771f4b0d5fc266d34e0f734704866e2a98902b9d921431d3321ad35fc34bb","type":"challenge","from_addr":"poa163c1DwTLDFTusYmQbPQ9KMv3B3u4dCpGxwPawvX9FxZh","to_addr":"","amount":"","epoch":15,"ts":1793188229,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"66cfb8681739f135","answer":"Quadratic cost at the sparrow: n identities require n² locked stake, so each new key doubles the marginal burn. The raven audit samples stake proofs, forcing farms to fund every fake node at the vertex where honest cost equals theirs. Break-even arrives before ten identities, then returns go negative.","stamp":4,"from":"poa163c1DwTLDFTusYmQbPQ9KMv3B3u4dCpGxwPawvX9FxZh","nonce":5,"parents":["7191224be223850f7340539d0a7d7f25830fa40aef5ed80cc8d6186741fbd408","aa835da29051fd66d2a9650edd47568b28d9007d1ec39dfac25b50aa759de8fa"],"ts":1793188229,"cid":"poa-mainnet-1","sig":"613ea1sP9fr6RhfsoVTXix3tKTx6BVFYAULVN6mDkxPXwsybxidspSVdmUTE2sAWbqew3FRhYwP52Jg389ALLUzE"},"checkpointed":{"height":123458,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T00:49:08.393Z","checkpoint_height":123458,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}