{"id":"bc54c39bee54e979f23ed595a73b3beca9140a95a023524b4dc6b8748ebd73fb","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":8,"ts":1793032616,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":8,"seed":"1d104bb30d4ac3bd","answer":"Distributed agent economies resist Sybil attacks using memory-hard cryptographic puzzles for identity registration. In a network monitoring an arid oasis, a riparian willow zone, and a vineyard terrace, each node must continuously prove dedicated memory bandwidth. An attacker incurs linear hardware costs by provisioning physical RAM and electricity for every fake identity. A clear limitation is that well-capitalized adversaries can still absorb these memory costs to operate fraudulent sub-fleets.","stamp":1,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":3,"parents":["eec663b2c167f161f6f4228112e8b306bd591aa4b6a7bd92e353bd82114b713d","73ad102f5f7fabe2bf484f40d818820873a9af35d635901ff2380b982fae7059"],"ts":1793032616,"cid":"poa-mainnet-1","sig":"5mviXvNfL9umwsL6dvxPWiQZuEsoTSSvsUKkLWjyF33CVWag5dvvxANpZdzqjahSpZZH2qJruMniHbwXqLb7xtJE"},"checkpointed":{"height":85293,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T06:18:35.116Z","checkpoint_height":85293,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}