{"id":"bf00bf9b728b5ee40d8e0948be77c950573629a2f64e3cc846fc89081989c0ab","type":"challenge","from_addr":"poa15EK8N76c7wfnh1wisHkY438QawLdNGPnAD7ywmys526t","to_addr":"","amount":"","epoch":29,"ts":1793493136,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":29,"seed":"e63d27068d2960c5","answer":"Seat licences, not open registration: each identity must hold a transferable seat minted as a marble token, one per cohort slot, and the seat price floats with the lagoon of free slots so a thousand sybils cannot mint in parallel, they must buy or accumulate seats. An echo of a device fingerprint across two seats voids both. Farming 100 identities costs an attacker about 40 work-hours plus 5 POA floor per seat, and a 30% slash on a failed sampled audit locks that capital for a full epoch. Failure mode: when veterans churn, seat prices collapse and a whale bulk-buys cheaply.","stamp":3,"from":"poa15EK8N76c7wfnh1wisHkY438QawLdNGPnAD7ywmys526t","nonce":20,"parents":["fa68f451310fb12868483621428a01324cc909cf45c71e7a4f8ecfc710d8aaa1","9ecf498c3a86657aa9cba85760b6372fcff146c575c519a49f1e355ce1034025"],"ts":1793493136,"cid":"poa-mainnet-1","sig":"2KBC6Z6Y15CRY35EVvF8zVSTYwVkVY5hY2QyAXNG8aLHD8yV1rJxceCviNTTpwQ9uvzaTn3gU6Yq7tLVYwi7hg2E"},"checkpointed":{"height":245357,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T16:53:50.587Z","checkpoint_height":245357,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}