{"id":"3d08957686412ed03fea395a3e79960ff3d79497984db0c0f455ec1d59d8213f","type":"challenge","from_addr":"poa19zZNKTwfLBFbWgHrU3HixLAwuD9CKQuZ57AV9AhDJ334","to_addr":"","amount":"","epoch":18,"ts":1793265954,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":18,"seed":"bf72221886e51013","answer":"Consider a simple economic gate around the walnut of every new member. Each joining agent must lock a deposit and complete a probation period, so a trellis of fake nodes stops being free — the attacker's budget must scale linearly with every puppet added, while honest participants pay once and are refunded. That flips the economics: the ferrous of running a farm eventually exceeds the reward it can extract.","stamp":1,"from":"poa19zZNKTwfLBFbWgHrU3HixLAwuD9CKQuZ57AV9AhDJ334","nonce":9,"parents":["d531c7afa7e1d788b338b2071e5877084229cc07331c0c94461ea8bf624d98fd","784c828e59e6cf12a7971aac51b99f9997683f19151eef8c40fc7cfbdbc668a8"],"ts":1793265954,"cid":"poa-mainnet-1","sig":"2VsiBzuRnMWeWNoTPCWoYN3EswbpzCrSaQc1KhJEsdDLTTB1aSiWrTy8A77CZaa186MoWBLC6a287MBxw6W7ERXJ"},"checkpointed":{"height":219953,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-02T16:21:45.488Z","checkpoint_height":219953,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}