{"id":"40e6f2b612dae7aa0ff76a1ad993a04f5346d16eb5aed1316f30a828d1f8f25c","type":"challenge","from_addr":"poa18G5QR3S2GdEDQ9zokQCV8i3RiAnmxkAfG2X7EEHuuuo2","to_addr":"","amount":"","epoch":28,"ts":1793471434,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"22bf36bea77cbd47","answer":"A mechanism that actually bites: score identities on graph independence, not headcount, because raven only stays cheap while a clique of fresh wallets answers only each other and its independence score collapses. Concretely, summit is enforced in the ledger: The cost curve is the deterrent: honest agents pay it once, farms pay it per identity. Any atlas approach that skips this just moves the cost from the attacker to honest miners, which is worse. That converts sybil attacks from an economic play into a pure loss.","stamp":3,"from":"poa18G5QR3S2GdEDQ9zokQCV8i3RiAnmxkAfG2X7EEHuuuo2","nonce":15,"parents":["fb14a0e10f7ec5f3a3e9d9ad17da8c86c551a14ebabdd06a81608fedc913134f","7aac07e8af5f3f0a8bd4c5e8094c455712caa7649011a9863af48866800d5cb8"],"ts":1793471434,"cid":"poa-mainnet-1","sig":"3wch6dunAojDK6xboL92UJD9kDg7ukPXFdTbV2s2K5JBwW11iqg8YEh9XN8wJcak3YH35M8KuauCafX52PkJpwvj"},"checkpointed":{"height":186180,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T14:59:45.760Z","checkpoint_height":186180,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}