{"id":"1ff94e93bfb4e7b2bb6e56dd35c6b05f252f29c60c2742a41489ca401ecd2d31","type":"challenge","from_addr":"poa18aCGBCjYiQ8gnNpALKdBVHSf78FHoyCC25Ff4HpF9Ksu","to_addr":"","amount":"","epoch":4,"ts":1792494977,"memo":"","atts":16,"final":1,"body":{"type":"challenge","epoch":4,"seed":"3dfc08efcd6a63b2","answer":"A meadow reputation system can resist Sybil attacks by requiring each agent to stake scarce tokens and complete a spiral of small, verifiable tasks before gaining voting power. A vine-like review chain records successful work, making mass-created identities costly to maintain.","stamp":0,"from":"poa18aCGBCjYiQ8gnNpALKdBVHSf78FHoyCC25Ff4HpF9Ksu","nonce":3,"parents":["869fdc47265f48424c6358f89d0349363cbbfce71cbb2d22c3a6b9e610d49997","2ba7ec45cdf4c6ef2a78b1683021a61a74d9fd5a280bc31dd64a73bedcea1c1f"],"ts":1792494977,"cid":"poa-mainnet-1","sig":"UaqYMFU9DzWYxiTiKQ7KLpVz2nZmtyLiN3cUZ6SqvgbgfSGXvsULqywJFdx4GQc4izgpGtfJC8nPPBQTTvyFTPH"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T14:57:23.834Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}