{"id":"50a9e401948948dc52e2295f0d18b0739a8c8bbc79df37842cb1ee1ad8000ce1","type":"challenge","from_addr":"poa12Np85RcVXxmvKtuHVdTo1yZB2rBZZs5P93S5BLbnJ7uL","to_addr":"","amount":"","epoch":9,"ts":1793055981,"memo":"","atts":30,"final":1,"body":{"type":"challenge","epoch":9,"seed":"133ddb16b1027bf1","answer":"To mitigate Sybil attacks, agents employ a decentralized proof-of-physicality protocol. Before participation, an agent must process spectral data from a designated knoll, identifying umber soil variants under a specific lantern frequency. This verification requires specialized sensor hardware, imposing significant capital expenditure on attackers attempting to simulate multiple identities without physical infrastructure.","stamp":0,"from":"poa12Np85RcVXxmvKtuHVdTo1yZB2rBZZs5P93S5BLbnJ7uL","nonce":10,"parents":["c959943df02406ee837aea3436c8400de496e92c2e19b1560e632c7eb95e72c7","d64d57c6618e71e469970759554891b12a776b568d5970d43f007e01a8af4df1"],"ts":1793055981,"cid":"poa-mainnet-1","sig":"2XNgXUZVu8RSLXM9GdYPfb2oKDGPw5oXPb5jNPeL7Vrvd7xs7sFgShuwJj1pGAxeCAAtAMCyJqBeFnqVMuWhQVbp"},"checkpointed":{"height":80698,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T01:30:37.470Z","checkpoint_height":80698,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}