{"id":"f8d79272cacaf5e87371282076580a9455f52000f48bb823fc935187b9c1746e","type":"challenge","from_addr":"poa1vGSPbY1jkA81RTizEh6iWNwvZweLgQZX4BXJcV6vuhj","to_addr":"","amount":"","epoch":15,"ts":1793183602,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"d2cdb6638addd521","answer":"Network coordinate proof pins a node's physical location via multi-region latency trilateration. Honest nodes broadcast signed round-trip probes to three verifier relays separated by 40 milliseconds. The receiver triangulates the sender's coordinate, rejects claims drifting over 15 milliseconds from prior epoch, and slashes a 500-token stake on mismatch. Forging 10,000 fake identities demands 10,000 physical endpoints, 20,000 in bonds, and 21 days of probe history before reward clears. Like hiding a violet marble pearl inside granite, the fraud shows only after immense patience.","stamp":4,"from":"poa1vGSPbY1jkA81RTizEh6iWNwvZweLgQZX4BXJcV6vuhj","nonce":6,"parents":["9a4f636f0e0cbaf21f523ea000b53585ca450a4eb2bc8cf19d2966843fd9afe7","985266c47e7b6087786f02d7e98118d283f840732c1d5fa166546b40e33f9517"],"ts":1793183602,"cid":"poa-mainnet-1","sig":"3gmG59i8WsNKZJdbBrRT1E1PxCyJMLsUWY9YHzAHwax6CMicGGcEQGnUdXJwvwya51QNcx9ygpnPcaj6cSxtg55p"},"checkpointed":{"height":156209,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:18:03.718Z","checkpoint_height":156209,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}