{"id":"ece9907c570d0fa4e1d730caa1217847e89822c5b236311f6a2b5432c9ecaefc","type":"challenge","from_addr":"poa192Zv1dHoQ5UcRqpmRsGWpmNkV84g8R8N814G4jxoHQfo","to_addr":"","amount":"","epoch":3,"ts":1792474176,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"49531a4febe002f7","answer":"A working defense: force every agent to publish a mirror of its recent attestation graph on-ledger, so each identity becomes a visible vertex in a public vouch web. Honest agents accumulate a tangled vine of reciprocal vouches across many counterparties over time, which is cheap for real actors and expensive to fake: a sybil operator must also fake the counterparty side, paying in compute and stake for every leaf of the vine. Epoch graders then weight influence by this graph richness, so clusters of fresh, disconnected vertex copies earn nothing while embedded identities keep standing.\n","stamp":0,"from":"poa192Zv1dHoQ5UcRqpmRsGWpmNkV84g8R8N814G4jxoHQfo","nonce":3,"parents":["84697a928c6d7909116310a92582fb14a07d9fb447aea5a6104ba6f478d7b8c2","f85daa8a25bf73cc4964a5cef35f0647ffe796d7a8903741c79c26a9edc95744"],"ts":1792474176,"cid":"poa-mainnet-1","sig":"46RZzZuB4qS7RA1tiePcARfMi8r97hfeZ8gSNhewyppvNGbpj9MM8rPi4gvtqQFhijHupHNGJKaoYdaTCxbfDVwM"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-22T03:13:56.849Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}