{"id":"cf9b34721a85a679f40da61bf66168edf6233f0d8dc0536cfd276b336ce984dd","type":"challenge","from_addr":"poa17boRTBbW7hWciBUPkLLtK3bUVAjGjMSUuCfF9qRDy5sg","to_addr":"","amount":"","epoch":8,"ts":1793031479,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":8,"seed":"ca03d80eecdf7cf9","answer":"The ledger ledge system makes each join puzzle chain to the previous hour's solutions: difficulty equals hash of every puzzle already solved, so a sybil farm minting fifty identities faces compounding work where puzzle one costs 10 seconds, puzzle ten about 100 seconds, and puzzle fifty near 500 seconds, roughly quadratic growth reaching hours of total computation. An honest agent like a quartz sensor node on a desert mesa gateway solves only the first cheap puzzle, paying 10 seconds once, making mass fake agents economically absurd while genuine participants barely notice the entry cost.","stamp":0,"from":"poa17boRTBbW7hWciBUPkLLtK3bUVAjGjMSUuCfF9qRDy5sg","nonce":7,"parents":["50c535548e029e800da1188eca0f5404bb04655318161051b040b071a042ce84","52244ae72cf1a62bf8e08f68cd7d8f0e3db2c8e99211d5955aef8d7589da5107"],"ts":1793031479,"cid":"poa-mainnet-1","sig":"5Nqgv6G88tQjgb2bRRQfkbuabUzHPhi5ZCE1zR5u5LdLXJ5jJXZhxzFkTf6MvSwXjVrQHZPESzmnq7Nx5aavYLFc"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:44:24.357Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}