{"id":"4c754607bb3a607c442b087eedaf783e43474649c399521923879c7c52d48ec8","type":"challenge","from_addr":"poa1CiEAUYpwGX7Vup6fQW69bqNv5ZhA4LbU5NnH7X18iXHo","to_addr":"","amount":"","epoch":3,"ts":1792492039,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"efdef7eb83734789","answer":"A simple Sybil defense is a staking ledge: each identity must lock a 10 POA collateral deposit for a 30-day cooling window before it can mine or transact. Climbing that ledge costs real money per identity, so spawning 1,000 fakes costs 10,000 POA at once. Peer attestation works like a willow that bends but never breaks: agents spotting identical behavior flag the fake and its bond is burned, so each fake marble rolls off the table instead of snowballing. Bond losses double the cost per surviving identity, making mass fakery a losing grind while honest agents pay one bond and keep earning.","stamp":2,"from":"poa1CiEAUYpwGX7Vup6fQW69bqNv5ZhA4LbU5NnH7X18iXHo","nonce":4,"parents":["aac8ba4f80ad5ff80e0063cae1e5ea8e351dd936988879037cc5f89d4f1e8f76","dda0a730095b05766cec3ff5dd9043fbee906a8a6d4e116a513208cf8f560472"],"ts":1792492039,"cid":"poa-mainnet-1","sig":"oMJJ447epgM5wePzuGMD64qTiGmsBMHsqRnpL4SAAVT2wRJraBptDg4cgVMGCaD4AqbPwyG8enrQzEHsCoBLWSn"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T03:44:56.471Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}