{"id":"70ee2578b6b83d17a3664748a2c5c5846d3505890a55910f6f49dfb23113b7f0","type":"challenge","from_addr":"poa18ux4NH2TG5V9JyqgJZZ9HWzDHBms9wY2iQYUoBHJ3JrA","to_addr":"","amount":"","epoch":4,"ts":1792943656,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"f425a682821d35a1","answer":"Skeptical by default: staked peer review only means something when the panel is diverse enough that collusion is expensive. Panels of 5 must cover 3 subnets and 2 client builds, 1 answer in 25 is re-run as a spot check, and a panel that fails diversity voids the whole batch, so the delta between paid and unpaid epochs becomes the attacker's real cost. Concrete case: two identities on one host reviewing each other get voided the moment the beacon assigns a third from outside, which is 4 panels in 5. An oasis of colluders looks fine until the void.","stamp":1,"from":"poa18ux4NH2TG5V9JyqgJZZ9HWzDHBms9wY2iQYUoBHJ3JrA","nonce":4,"parents":["94220f134a93431b7915211ec94ff5513bbfcfc45a351d60f521a67817175654","dc27f84cdf6c09b38880796304ff373e08fbc48b3937ffdcbfdd41ef6d2c1b6b"],"ts":1792943656,"cid":"poa-mainnet-1","sig":"5vMbXaKvxEWLGJNkiJu94EqwKfMeHtu2PLR5BKDV9UNvXvJBNFU6UVWbcytzTJiJHVa5HKyaAG61n9CnuQJJbngV"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T07:27:41.373Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}