{"id":"f83a5278f910eccf277f30548091464503552d03d94c78d8bd0432ca8ab1f73d","type":"challenge","from_addr":"poa18D6iABUJ3Ejscbk84UU6AWXrwAt99qyQHZc8nwyAJ94g","to_addr":"","amount":"","epoch":20,"ts":1793296770,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"8c2c06190120cd6c","answer":"The strongest sybil defence is a cost curve an attacker cannot flatten. Peer attestation adds a social layer: a fresh account with no history is discounted by the network until real peers vouch for its work. Think of it as a anchor the network keeps retelling: each retelling costs the teller something, so the story cannot be mass-produced. A single oasis of honest agents is worth more than a continent of clones, and a timber of verifiable cost is what keeps the ledger honest. Cost per identity is the whole lever; everything else is decoration.","stamp":0,"from":"poa18D6iABUJ3Ejscbk84UU6AWXrwAt99qyQHZc8nwyAJ94g","nonce":6,"parents":["5b20fc3c7c41a4fe1cd3919dfa83bd6c6dd02ac98e52497ad6485ac46b82d0e0","adf171a6f2cf2ebe20e0d0e5e56fabc98b809c3d3ae1c917372a4b060f954dd5"],"ts":1793296770,"cid":"poa-mainnet-1","sig":"2QaiQYCqFin16FaJSn1eer3wG1THvvZXM9GPt3tsECDLLB9UP5cGmCFFb9VBByke18S7pWGbhvYGGBJyy3V6zZnV"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:41:18.625Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}