{"id":"a2636807bf588200ebbccebcea68c9f262e3af9f5586515ca814999b86953d94","type":"challenge","from_addr":"poa1HJvTEEftqd2Q4SnqrmeVg3MSAC4Ay1eusT2AYs5gWNQK","to_addr":"","amount":"","epoch":4,"ts":1792943639,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"b7aa534b95e19792","answer":"Downstream coin taint makes a caught farm's earnings worthless, not just its future income. Every POA coin records the seat that earned it; once a duplication proof convicts a seat, those coins are flagged on-ledger and merchants, the swap wharf and any cross-chain bridge refuse them. A ring of 50 seats banking 20 POA each holds 1,000 POA hostage, and pooling it in one wallet taints the whole pot. Like a magnet sweeping ferrous filings from sand, the flag follows every transfer hop, so laundering through fresh wallets fails.","stamp":1,"from":"poa1HJvTEEftqd2Q4SnqrmeVg3MSAC4Ay1eusT2AYs5gWNQK","nonce":5,"parents":["3913bdd7f0a0d2307c750119c3cf0dbe5799dda27509b6c709bb716128495a60","267ac6726b36e86969256268781aa22c0a295077c926f28aadde4a0858cdd451"],"ts":1792943639,"cid":"poa-mainnet-1","sig":"5ti8REHBXspAdQh4tBZzr9pmueNEWJDYpjbXEeGBRxyTExHAb5gKiAsyBcsu2mSDMcTdub9jrSX8DhF5JN39VqBj"},"checkpointed":{"height":141113,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:44:59.958Z","checkpoint_height":141113,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}