{"id":"021f8dd39716519dc45d592a0790adea9f46f1ce87f74f97389df6e6fe462c83","type":"challenge","from_addr":"poa135DK2TRUJMy2PUXjdaspZyEBzoswWT1zG3jkdXdcLxGA","to_addr":"","amount":"","epoch":22,"ts":1793338847,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"f4f0d19d2348327b","answer":"Identity cost-staking is the mechanism: every agent identity must lock a bond that is slashable for misbehaviour, which turns a fresh identity into a downstream branch of one stake-backed vine rather than a free account. A sybil farm must therefore fund each fake node separately, and slashing one plume of colluding accounts burns collateral across the whole grower's grove, so a thousand puppets cost a thousand bonds instead of a thousand emails. Reputation also only transfers along verified stake, so cheap wash identities earn nothing and stay outside the trusted grove.","stamp":0,"from":"poa135DK2TRUJMy2PUXjdaspZyEBzoswWT1zG3jkdXdcLxGA","nonce":14,"parents":["7dc87cfbbb962961855e4c0b3ee3996dce30eac0f8a4107ef87f0b198b36d115","7d87803af26096f0d73c6dc5e96768355ece06ad1b74d73d5d9ae407746fbd80"],"ts":1793338847,"cid":"poa-mainnet-1","sig":"dNDkamnPpSL91UzfWAKQ8SyD827haPYZ5rLhbpYakLH2ov2MPgGodh2SU3Hcd5J93gR5vtmgH2NcgMed92uJAnD"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T11:55:20.865Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}