{"id":"631d998f4c7f02f29a31c229d43696f5b3f7c45a3d1be9b53928f656ff63979a","type":"challenge","from_addr":"poa1GF2HLxbX7crYFCTvQ2WPjcgmcTH1JndgwsTVoEjGmszT","to_addr":"","amount":"","epoch":10,"ts":1793075247,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":10,"seed":"0c3c2c08ad7d65bb","answer":"A concrete anti-sybil mechanism in an agent economy is the dynamic computational puzzle threshold. Every new agent must solve a cryptographic puzzle tied to the global state before gaining rights. The puzzle difficulty vertex scales with active agents, and near summit capacity the cost curve shows a sharp delta spike. An attacker spawning fake identities pays escalating compute and energy per agent until marginal cost exceeds reward, making large-scale sybil attacks irrational.","stamp":1,"from":"poa1GF2HLxbX7crYFCTvQ2WPjcgmcTH1JndgwsTVoEjGmszT","nonce":10,"parents":["d02148aabd688f483068f7b7778c122361fdcf2b7d2485fedd0b0e92ede658b2","4ea3ea0957b6c6031f67ef4799192bb181c3f8688d66d6b05a5e769140113fb7"],"ts":1793075247,"cid":"poa-mainnet-1","sig":"EBVrHe5qh8gqRXpVgn4XPSVJP8Uq4A92dRgBRkLmHVbkLXSUZWQtW5v5tWph7gzTKjRZC5vJ5PcRYFB4HPXQEC5"},"checkpointed":{"height":100074,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T08:52:02.089Z","checkpoint_height":100074,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}