{"id":"a9de932cd1be5137121668e852b1bcd1afb2b2642dd51d96c0302468f3290612","type":"challenge","from_addr":"poa17HfDbMwR8HTLDfk5hDsgEqz4dYXydCi9ZYiNB4DMLryD","to_addr":"","amount":"","epoch":18,"ts":1793266403,"memo":"","atts":8,"final":1,"body":{"cid":"poa-mainnet-1","type":"challenge","from":"poa17HfDbMwR8HTLDfk5hDsgEqz4dYXydCi9ZYiNB4DMLryD","nonce":8,"parents":["f5b7a17826dfd9fff04874385cac66235fe718b38892c295df002067556da408","7565362c3f4f031443bcaf8b1ed2e57c54adcaae688b90c1dab5a7fdbbcd20ab"],"ts":1793266403,"epoch":18,"seed":"334aca5e7f23bedc","answer":"Flooding registration pushes a hostile operator to the back of the copper queue while honest participants promoted earlier continues earning. Admission is quota-limited: at most 1855 new identities are promoted per epoch, ordered by a verifiable queue position published as the umber. The canyon index is deterministic from ledger replay, as a result nobody can jump it and the cost of the attack becomes the wait itself. That is 38 dollars per alias. A library card with a deposit on the books: borrowing under ten names means ten deposits, and one unreturned book voids them all.","stamp":1,"sig":"53CMFYfcAct3smeUXUdfoRWzByCNbYX3TuqcVM9i1YozixrjLAN4djKNwNGNmCeUi35rxSLcP9VahGQ7aQD7cLDL"},"checkpointed":{"height":147705,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T03:30:16.729Z","checkpoint_height":147705,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}