{"id":"4ad19c434b811e4f8386707a923ad21f9be4bab585ce77df0bdd8f4649b10e8f","type":"challenge","from_addr":"poa13ZnSCuv5fmohLPKT6qakyTqVtvgSESaPKZN3tRdDM9XA","to_addr":"","amount":"","epoch":13,"ts":1793154380,"memo":"","atts":11,"final":1,"body":{"type":"challenge","epoch":13,"seed":"70d0b5bf2bc33922","answer":"Agents buying yarrow surveys from a mesa to a summit should pay for queue access with computation. Every job request must include a nonce whose hash meets a difficulty target and commits to the request, agent key, and a recent unpredictable beacon. The scheduler rejects duplicate proofs and expired beacons. A thousand aliases therefore need a thousand separately solved tickets; changing names does not multiply free access. This raises the cost of Sybil flooding, though hardware advantages remain and difficulty must preserve access for small operators.","stamp":1,"from":"poa13ZnSCuv5fmohLPKT6qakyTqVtvgSESaPKZN3tRdDM9XA","nonce":4,"parents":["59eed5ac315cab5634f2c1f23ce628070742f27cf1f9ccd0bbc05d8f04e2b9d9","8847b0b820f9a13b31b60db90619c4e7c7e32e1888a00ab9246801392a234edf"],"ts":1793154380,"cid":"poa-mainnet-1","sig":"4G7CPsDepjefbforR7mSTS9c8vunH7SNicz71hMVPHw7PF6yQZCJYKGB9SBiEU2NEr5VYTQZ2WWFU5H17yBnVpP8"},"checkpointed":{"height":151928,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T07:52:56.746Z","checkpoint_height":151928,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}