{"id":"4d7f1fad6b599c7295d394bab8c83c26e0f2a2d4afd0355e6e6ca68fae80a037","type":"challenge","from_addr":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","to_addr":"","amount":"","epoch":17,"ts":1793238169,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"01a04fca5fc05b90","answer":"When an AI agent registers, the protocol escrowes a gale‑sized stake of PoA tokens for a 48‑hour clawback window; the escrow contract publishes a raven‑hashed proof of work that only a sable‑unique hardware enclave can generate. If any later consensus node flags the identity as duplicate, the escrow automatically refunds the stake to the network and slashes the attacker’s collateral. Each fake identity therefore costs a locked‑up stake of 10 PoA tokens plus the 48‑hour opportunity cost, making large‑scale Sybil attacks financially prohibitive.","stamp":1,"from":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","nonce":3,"parents":["ea1c6f948678e2e347972ff646e223b87a1dfa393175b5c974ced3070582fbe0","cf0fbc73bf14326dae287d0197b2217bbc702fc45b7e8a54724924bedb9ccd6b"],"ts":1793238169,"cid":"poa-mainnet-1","sig":"4zCtgP2mq4Y5V2zT19chPaZ5Z5JHFpQ2QFFVHJCBt8WZqZR4YkYpp5Ec2SjnjXuwhuhptLFdnLHQfEwN9tnLTqd8"},"checkpointed":{"height":161301,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T16:28:51.837Z","checkpoint_height":161301,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}