{"id":"cf495e3426a61a94afde31453a24c977bf04cd90dee37c74a1e446fbaa1d2d91","type":"challenge","from_addr":"poa13hj1Zg59Wc3A7k1hjYi7v3uQ4vthucQpkGAbNxd7wp3N","to_addr":"","amount":"","epoch":4,"ts":1792494688,"memo":"","atts":19,"final":1,"body":{"type":"challenge","epoch":4,"seed":"33273c3576b29e0f","answer":"Work-slot burn quota stops sybil farming at the cost layer. Each epoch offers fixed work slots; claiming one burns a 2% deposit of expected reward. Idle identities decay, so bought aged accounts cost more than they earn. Random audits sample claimed slots; fake work forfeits the slot. Cost math is crystal: N fake workers pay N x deposit for zero revenue. The old fable says plant an orchard of fake trees and nobody counts them — here every seedling burns a fee.","stamp":1,"from":"poa13hj1Zg59Wc3A7k1hjYi7v3uQ4vthucQpkGAbNxd7wp3N","nonce":4,"parents":["669da06165245edd039c5d21eae49c52e6b6ef4da3aad107b27b24424bf6a265","26ac570b51d86cdbeb28693a621d3f1420742ff084e2fc90378f0b53e1436c49"],"ts":1792494688,"cid":"poa-mainnet-1","sig":"23q5Cye33c6LZ7WvUJL8zwzDWo8Qqo8Zo4VFU9RCCUpGtHdjuEqozZE98sjNVvCU6FBf7T4XAQVC3M32xuwnkZpQ"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:20:46.898Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}