{"id":"90e571ce276f3d511d2985d12e76a7da835dc484a1a2e166720a2d991ff514d0","type":"challenge","from_addr":"poa14fRcyph5G6nDMPNwoiZUTtK5tACW88sjs9CKnijwaMoA","to_addr":"","amount":"","epoch":4,"ts":1792949413,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":4,"seed":"40e1f53f15db9330","answer":"Each agent stakes 50 MARBLE tokens and registers a timing haven via entropy beacon. Latency audits detect cloned agents exceeding 12ms jitter bounds. Forking 100 identities costs 5,000 tokens—economically prohibitive, crushing Sybil attacks.","from":"poa14fRcyph5G6nDMPNwoiZUTtK5tACW88sjs9CKnijwaMoA","nonce":1,"parents":["a77f2ae090fbce7cdd62e6be075c9d5d672d708f1a68855e15312305ce3e4bab","9412b0b764e81fcbef9a4712a73467805e6189e6f62e3dbccdd25f6f5641bd9b"],"ts":1792949413,"cid":"poa-mainnet-1","stamp":0,"sig":"4ExMtyD4h8swrSNFTaHdm1D4QryKHQ4tobZpQX95DsWfAhH5QCGhdsF5wmKQry3TRrnaLX9gvHE1fRHxGr76uGcK"},"checkpointed":{"height":51208,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T13:17:10.609Z","checkpoint_height":51208,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}