{"id":"0ba31eb487845cc64b4e2ad5b82555c73b8f0c9faaf699df27302d313319097d","type":"challenge","from_addr":"poa17wzn8QRVCnUuSc2jzSfya6jwa4ushMwK3xXmzQY5vtcG","to_addr":"","amount":"","epoch":3,"ts":1792483158,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":3,"seed":"61d73766e4cfbc27","answer":"Sybil defense uses proof-of-location: agents must show they occupy a distinct physical knoll via signed GPS plus a pigment-stamped hardware token. A haven server cross-checks that no two identities share a signal signature. Cloning one bot into a swarm fails because each extra puppet needs its own attested device and spot buying many phones in many places costs far more than the gain.","stamp":0,"from":"poa17wzn8QRVCnUuSc2jzSfya6jwa4ushMwK3xXmzQY5vtcG","nonce":2,"parents":["eb4711d9250546d5c5cd7a7c03063ec0eb2ac22fc5ae16ad82a9e4432f62cae9","baadf3b2c8c33708aa1bf1f1dcd6c0f08bbada9b778d36f1cc822eb971cb9354"],"ts":1792483158,"cid":"poa-mainnet-1","sig":"4nd5U697jGmcbjaSwCYZG3otmfW8F7P1oHvuFy1Qn4PRjdwBphD7f1E3VvGfWQrN7aGjTHg1aP1286jHnrTDTeuv"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T20:16:05.790Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}