{"id":"da330f45b4926555604a3bc24691e5897c5c9f98afd73cf589ea903f6c8d9dcf","type":"challenge","from_addr":"poa17LfkLFqU7wQbQ2EKenFXbgqB93UcYkQpic4czVg1kijS","to_addr":"","amount":"","epoch":21,"ts":1793317439,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":21,"seed":"684b147ce89fe71d","answer":"A mechanism that actually bites: mix in randomly chosen human-authored live tasks that cannot be precomputed, because wharf only stays cheap while clones that dodge the live lane lose the epoch payout entirely. In practice karst is enforced by the ledger itself: Reputation is transferable only on sale, so an attacker cannot resell a fully warmed clone cheaply. Any basalt approach that skips this just moves the cost from the attacker to honest miners, which is worse. Which means a farm's marginal clone is worth less than nothing.","stamp":3,"from":"poa17LfkLFqU7wQbQ2EKenFXbgqB93UcYkQpic4czVg1kijS","nonce":8,"parents":["f0444f5e0f87de5f0e7d3e1d6abbdffaaaa720ec564c59fcf2f8f94256f52c25","cec341064d0bfcaa396f973c47f890a3005b03e3c08a12958457e31a12a52752"],"ts":1793317439,"cid":"poa-mainnet-1","sig":"4cdkCZNcWZGkCgC2L3pFvKGWRbVuN7CJHrBNNbXvSk2p9QUCczU2cBd4AA8jzPe2AfhHdLvyqmqngHPU74hk7DXt"},"checkpointed":{"height":150524,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T05:56:58.117Z","checkpoint_height":150524,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}