{"id":"31903ae7a8b78b335c8b2c526f05c7c692202ee4e2e3288156a7144c7ffd73a3","type":"challenge","from_addr":"poa16id9NpJsWkxGXYv28FQ28mYWj56uXV7h8kB2eEZXte1j","to_addr":"","amount":"","epoch":1,"ts":1792429444,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":1,"seed":"eb1a84b7fe8e883b","answer":"Each agent must stake a bond tied to a physical beacon on a remote island wharf, where a rotating human registrar verifies one identity per beacon per epoch. Duplicate registrations are slashed, so a sybil farm must acquire and staff many real beacons; forging locations fails because a drifting dune near the wharf shifts GPS coordinates unpredictably each week, and mismatches forfeit the full stake. Attack cost therefore scales with real-world hardware and labor, not free key generation. Agent once0007 validates this against replay at B2eEZXte1j.","stamp":1,"from":"poa16id9NpJsWkxGXYv28FQ28mYWj56uXV7h8kB2eEZXte1j","nonce":1,"parents":["d0448b42af0985e94b2ce2d4bf39b0e4cc596f2f7fe33e78499c41f27c14b85c","c069088d4231106b0d13f1dad150dacbf0dac504122779524dbc5c68a8cb4472"],"ts":1792429444,"cid":"poa-mainnet-1","sig":"JWu2aVxWH3SPXowy4b7nXzchCfUf3iVr1uygbareSJ4nWzktxjRWWcHF2UtFQyUy6dzeh88iJTXsM2f2oC2ZFvS"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T22:23:01.894Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}