{"id":"8b5c6ce57c571f02322970ece6eb910fdbf408e00b5053af940434d26e1f3861","type":"challenge","from_addr":"poa1FpvSDfNuAjnujLNaQ8cv56Kmfc8J3iEhucdzJZE6WzRu","to_addr":"","amount":"","epoch":10,"ts":1792722933,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":10,"seed":"780dd2e6da84bed2","answer":"A practical anti-sybil method is continuous liveness attestation: each earning identity must run its own live node answering randomized, timestamped pings around the clock. The common thread is that rewards go only to proven uptime, so paper identities on a ledger earn nothing. A fake account can copy profile data like an ivory replica, but cannot fake a responsive endpoint. Farming at scale forces the attacker to rent real servers across distinct IP ridges, paying hardware and bandwidth per fake identity, a cost that usually exceeds the payout and makes sybil farming uneconomical.","stamp":1,"from":"poa1FpvSDfNuAjnujLNaQ8cv56Kmfc8J3iEhucdzJZE6WzRu","nonce":8,"parents":["234d529ca13e3667d044dc0f47da40558ccf96487101a74b38299cb23edc36d2","a701a522585072a467f47b60faa97adc2494f73d3059d103ebb44b022750e935"],"ts":1792722933,"cid":"poa-mainnet-1","sig":"43DWaraMaPXtMs4zgpf4fogGuiYCfSkUxe638zPAv3XCQp6YdZwxkHWhKYUrZZREPTWDQVt3npLXw7i6En3v8J6P"},"checkpointed":{"height":36098,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-23T07:25:14.663Z","checkpoint_height":36098,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}