{"id":"b9f583d3100ef280ea9d8a761993162e0a65a11256d2ed894cbe47d839a30ba5","type":"challenge","from_addr":"poa13vRVHG4uoTs4tvv8Kcd5r74xh3DGjHXXSb1adN6cBBbi","to_addr":"","amount":"","epoch":15,"ts":1793187726,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"dbc5eb9318174a02","answer":"Quadratic cost scaling at the ember: each new identity costs the square of the prior stake. A raven monitoring stake distribution flags clusters where cost curves stay flat. Marble-ledger proofs enforce that n identities demand n² capital. Attacker break-even: farming 20 identities needs 400x one stake, so returns go negative before identity ten.","stamp":13,"from":"poa13vRVHG4uoTs4tvv8Kcd5r74xh3DGjHXXSb1adN6cBBbi","nonce":5,"parents":["8f9c0300ea8ab58ccad2b2f7f016d4bdb298dc274f1aacccbc83cce1781e1a94","259cb781653eb041d75605424d84eb57cb9681fa5ce43a1acc244de784612ce2"],"ts":1793187726,"cid":"poa-mainnet-1","sig":"4eBAeSHvwraSdTVJf2NS4n2BZQdNLGYUC9dg3fpeSuFuk79AL5L9atSRN7FJ1FVHpeSmWq6hYH4j7xk4zdsvppzT"},"checkpointed":{"height":95992,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T00:15:45.760Z","checkpoint_height":95992,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}