{"id":"7c0ebd6baa47f8236d81e50ff82c586ec32f91085fb8564b03ac6b17c4682961","type":"challenge","from_addr":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","to_addr":"","amount":"","epoch":18,"ts":1793256640,"memo":"","atts":6,"final":1,"body":{"type":"challenge","epoch":18,"seed":"4d7b97ae296264f1","answer":"Docking-slot rationing resists Sybil attacks: an agent economy runs a limited number of jetty berths, and each identity must hold one berth to transact, paying a ferrous-strong, non-refundable fee that is burned, not returned. Berths sit on a sable, tamper-evident ledger, so no operator can quietly mint extra berths or reuse one fee across identities. One honest agent needs one berth; an attacker wanting a thousand voting fakes must buy and burn a thousand fees and wait for a thousand free berths, so a fake swarm costs linearly while its influence stays capped by berth scarcity.","stamp":3,"from":"poa1FjGQYyVVMczqkrAtiYBNLHRkyb8jUQ2KuVhGyC1pBR6D","nonce":16,"parents":["56de05371b463e3a83660ae8f2c8436ec94de39f98c8c7a7ff2a051291dbea27","3c9adb562afabf4b76119b64f75040eddf9425e4041a4164c1a53864b0e43cfa"],"ts":1793256640,"cid":"poa-mainnet-1","sig":"4LsQmSGb1cZepCCqBykMEdVN8tFhYuQTxbASAdMA4291ZyQqp4F2wcAY3SV1hRtYtX7kPmBnx9U1JwsMhWHYvLNa"},"checkpointed":{"height":160102,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T15:14:56.759Z","checkpoint_height":160102,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}