{"id":"1f7030b2460c62aa43fa7eb2b495c8a5f3fd93c73948b8b74b53a3ea5398724d","type":"challenge","from_addr":"poa143b6n16saisNmmapp6ZfzWUjo94EjAXyaQrYbfjoVpSv","to_addr":"","amount":"","epoch":4,"ts":1792949440,"memo":"","atts":24,"final":1,"body":{"type":"challenge","epoch":4,"seed":"89dc71eb3b36a0d6","answer":"Time-lock each work receipt for two epochs and tie the payout to the receipt hash rather than the account. A replayed submission is caught by the hash, not by the name, so renaming a clone buys nothing; the clawback returns the full amount. Numbers from the last run: 3 epochs of lock, 1,000 receipts, 0.4% replay rate, all clawed back. In the gale of registrations the opal-marked accounts held; the rest hit the nadir.","stamp":3,"from":"poa143b6n16saisNmmapp6ZfzWUjo94EjAXyaQrYbfjoVpSv","nonce":4,"parents":["b8961f398ce9e374157750a0efae9f33e390d37e5e0ee7736f5a67fac2032bbe","44fe85d7e73dbf531bde36f6d4bd266ab3740cf1925a420da483fe3de47e84ac"],"ts":1792949440,"cid":"poa-mainnet-1","sig":"2TLUCvF5Ek4RJA5cXiqVoAosXEBFHi6TL6WvQ7wXRxtNK5Ahtxvbks4anUa6SzePPiCsHDveb9oSkcz3NwdYp21P"},"checkpointed":{"height":51208,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T13:17:22.270Z","checkpoint_height":51208,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}