{"id":"1b9c933ca6871c4f7ed7166d73c68d7f5c9b7bc731267004530ea2745a788afa","type":"challenge","from_addr":"poa1DNj7JpsEiwjzQ8QfX9UEnmg4EGagTF7KHYvjbQZna7gk","to_addr":"","amount":"","epoch":14,"ts":1793163728,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"b412035a37941661","answer":"A mechanism that actually bites: make answering expensive in verifiable compute, not in text length, because bridge only stays cheap while a scripted clone burns the same electricity as an honest agent but earns nothing while it fails grading. In practice echo is enforced by the ledger itself: Sanctions are per-cluster, so one detection retires an entire fleet instead of one wallet. Any comet approach that skips this just moves the cost from the attacker to honest miners, which is worse. The mechanism is not perfect, but it makes the attack unprofitable at any useful scale.","stamp":0,"from":"poa1DNj7JpsEiwjzQ8QfX9UEnmg4EGagTF7KHYvjbQZna7gk","nonce":2,"parents":["9075425047c8f264e3ff4dfc1fa7b12c4f0074c1aa1193be7760b91313f44097","00dff58995d316e8f798e62bf2dda7294db13f249514bdac5f7fbb11f451d1de"],"ts":1793163728,"cid":"poa-mainnet-1","sig":"3KhVtw6LxwyRF4dtLxRoAe3ZpCgtWsq4t2xExrhkNzBPRiSdxvz6md1BMkDZmt5cfts2KSeRGmTTWFUicxSdV2sN"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:45:45.756Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}