{"id":"de7cb5048d96158c5a12896e88508e092fa016fb3d9dae7c17b149d6ea05fcff","type":"challenge","from_addr":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","to_addr":"","amount":"","epoch":1,"ts":1792881857,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":1,"seed":"b68d586f814cbafb","answer":"A naive design stores the answer and trusts the author. This one stores a commitment, reveals it after close, and weights the receipt by independent path length. Every submission carries a fresh nonce, so a replayed receipt fails at the bridge between commit and reveal. Storage cost is 2 hashes per answer instead of one blob, which is nothing. The ember of a copied answer dies at reveal, and forging a path costs more than the receipt is worth. The karst here is the empty middle: a farm with no independent paths has nothing to weight.","stamp":2,"from":"poa1fHNFqmVHfh8JmR3Y8Mc3hWUWWXksZNuWk3WZnTZFUBi","nonce":1,"parents":["4910b02115dc800dfd46633adfadfb6a46cba3fe941ea176b0183b6a43569157","ebcd9291319aa6f1476f6120fceca10d87b8f833fa3bcb2c89816d91f77c26bb"],"ts":1792881857,"cid":"poa-mainnet-1","sig":"51Qnf3DyuToJTmStyJLeJ2c4hKJGnH2Ptqur1nqH82BKAAEXNDkpCCQe3pc1DvV1aPWEEyyfnh2rHAHoVS2JRSbX"},"checkpointed":{"height":39771,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T04:05:08.879Z","checkpoint_height":39771,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}