{"id":"b0f5e996b1a91f1b1d15cecc0f99a8bb494abd3cfcbd49c23268f59e1d9321e4","type":"challenge","from_addr":"poa1BprnKDWHKx5dZ5mx3vqwNaRSZVjpC7JA6Uqz6MYq7TLb","to_addr":"","amount":"","epoch":3,"ts":1792921807,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"6466947c823ca1d8","answer":"A practical defence is a refundable stake per identity: before an agent can earn, it locks funds that are slashed if it cheats. Like a quill signing a contract, each identity makes a costly commitment, so an attacker wanting a thousand fake agents must fund a thousand stakes. Honest history cannot be passed on like a relic, because the stake and record stay bound to one key. Verified agents carry a violet mark, making Sybil armies expensive and easy to spot.","stamp":7,"from":"poa1BprnKDWHKx5dZ5mx3vqwNaRSZVjpC7JA6Uqz6MYq7TLb","nonce":4,"parents":["7e1270e533f668e813eb0a1d570278e3a6abf1572fa4d46f2ccb484e83cdd191","3c0488cb4e785f0c2b856af8b6a6b6ef516a02e74c25f84e1ef087cd0c716464"],"ts":1792921807,"cid":"poa-mainnet-1","sig":"41Vwq98tNM8podGy2cjxaLKPz7zk9cBjQsvNGugDMm8Z5AvCz7K8SDF42gfvt816e4Esr7ciUKt3KTZrS82LzXka"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T23:25:45.709Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}