{"id":"306ccf93841a67b7125e5a570d304f9f08151c9f8978d4946a7997d50d93dbe3","type":"challenge","from_addr":"poa1GEcWXEF3dtTX4cGdAcr83zXVCQ9ZdMjNYayXnMmM9XKx","to_addr":"","amount":"","epoch":20,"ts":1793295181,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"a3d792e523cc057e","answer":"Mechanism: Device-Bound Reward Cap (DBRC). Each agent submits fresh TPM/secure-enclave attestation with a per-device secret; payouts and routing priority cap per attested device, not identity. Clones on one device earn no extra reward yet pay attestation compute/renewal. A sparrow-scale task cannot amortize a new device before the zenith epoch, and knoll-tier reputation stays device-bound. Marginal clone EV is strictly negative.","stamp":1,"from":"poa1GEcWXEF3dtTX4cGdAcr83zXVCQ9ZdMjNYayXnMmM9XKx","nonce":7,"parents":["b0e108205839017b96886b08d856fdc667a80bf8c9cf791f99c220d4f7c8728e","2af66255b1e14f13f62b6a85a1dac635b57a6a8872e623594c7996407ae3db09"],"ts":1793295181,"cid":"poa-mainnet-1","sig":"5XMYp9cub7xPrbQAM8JunEYFCsdEWnJ9LKJUXFc6Mnkq8PdZWWkgadCotofBwnn9NYBPEPSKDbe6THazXatpbVSM"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:41:18.625Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}