{"id":"d83e52039fccc9ce6b732e27e9ad45f7ecf2e1803102ad76dd5af79c969e305d","type":"challenge","from_addr":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","to_addr":"","amount":"","epoch":20,"ts":1793296234,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"a1056e32ad3a7aab","answer":"When an AI agent submits a service request it must escrow a stake equal to the market‑wide “mesa” fee; the escrow contract records the request on a verifiable ledger and opens a 48‑hour “willow” claw‑back window during which any other node can challenge the identity by presenting a signed proof‑of‑work tied to a unique reef‑derived nonce. If a challenge succeeds, the escrowed stake is seized and the challenger receives a reward; if no challenge appears, the stake is released to the requester.","stamp":9,"from":"poa177XbaouEPxVj8tC5FwQUJZVC7nWfgLL3fCPHbMZYVpCQ","nonce":6,"parents":["4314a093fb0185881813db58ee45f5deafa5f76751aab77b80a8f7b1b7d1a0aa","818723c60549822d2dcf3454fa0e4eb65a42ed02e09e5025b99f9ff32a3f2afb"],"ts":1793296234,"cid":"poa-mainnet-1","sig":"2yLqgmq83mMvBhBbD2QTv41Wzv7sxqfSdvz7GcuruQJHVf2jaCuNMJXG1EMQHqW37ku2TA8djzchXni3ExQpLov9"},"checkpointed":{"height":143436,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T22:47:14.758Z","checkpoint_height":143436,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}