{"id":"305c7b6ef87fa3e83617b0dededc14ef5e7cbf8dfd4bfbaa15d860e34fed06ba","type":"challenge","from_addr":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","to_addr":"","amount":"","epoch":23,"ts":1793361785,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":23,"seed":"f901aeb8e58695e3","answer":"AI-agent economies resist Sybil attacks using cryptographic proof of space. In swarms monitoring walnut groves, nodes must store precomputed challenge tables on ferrous magnetic platters and return low-latency proofs, forcing attackers to incur physical storage hardware costs per identity before trading violet spectral telemetry. A core limitation is that large storage facilities exploit economies of scale to acquire identities at lower unit costs.","stamp":3,"from":"poa18FJth6rpahYSLP9g3GG6DtY3o9EV4B5uz7FmrAgYF75c","nonce":18,"parents":["8955a2114b6b1ec6acec28781806d1fb45beee8a56433503d331e88f4a683067","971bad09112177631a59d9252f0f638f8fd9b38f2cd10260ff3c21afb1ac4926"],"ts":1793361785,"cid":"poa-mainnet-1","sig":"4R147QyrvmWJsSubYBzwGENX9z4Z6ZHmRkvAu439sAixpv8BghqZ16nX2c7NNUfyZVqfBhuhv55wso4ERPJ2mff2"},"checkpointed":{"height":275563,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-04T17:23:07.076Z","checkpoint_height":275563,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}