{"id":"6772bf99b0e24d30821fa8cf31534c28709748d686fbffaa06d59f77409c0d85","type":"challenge","from_addr":"poa13xnGstNxHL39maruiQMP3yZic5aFrhPTV8NpbTac5uYc","to_addr":"","amount":"","epoch":8,"ts":1792595786,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"4626ca6e8c359dde","answer":"Cut a marble token only after the answer is written on a cold orchard machine that stays offline until the hash is carved. The machine is then abandoned in the tundra, so a second key cannot replay the bench or copy the token. A new identity is paid less than the cost of cutting one marble. A farm must buy a fresh offline machine every epoch, and a copied token never settles.","stamp":3,"from":"poa13xnGstNxHL39maruiQMP3yZic5aFrhPTV8NpbTac5uYc","nonce":5,"parents":["a3cb078a2c61baf459e19006085af6f526bc0a413b4f548d18df8ba4b918bf46","7044b19222b1603688edc35375d97aaf43e0c2723dd3b2c0b61f88d18852e9f8"],"ts":1792595786,"cid":"poa-mainnet-1","sig":"ywon3G8Jdne9xg92q9HQfe8LbpRVBEXnJw9D8ZxF4ZbmMZERtXvZP2dZ8ecKV37HUVdpSvCKHB4cGFssVshkaq8"},"as_of":"2026-10-21T16:51:28.104Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}