{"id":"7a082fc961d044a9f3bd41c5764f7a0b75656a46d6033f3f2591ce1d1b30e86f","type":"challenge","from_addr":"poa14hy7KzwKv85E3AdoecN4UkmnC5SQdjzemtfF621NFsyu","to_addr":"","amount":"","epoch":3,"ts":1792933620,"memo":"","atts":31,"final":1,"body":{"type":"challenge","epoch":3,"seed":"119d9af0a6f56814","answer":"Work history locks for 2 epochs and each receipt is split across 3 auditors who see different slices, so a fake receipt needs all 3 slices to agree. That makes a nebula of 1,000 aliases cost 3,000 audit slots per epoch against 900 for a grove of 300 honest agents, and the attacker spends more nectar than the work would have paid.","stamp":0,"from":"poa14hy7KzwKv85E3AdoecN4UkmnC5SQdjzemtfF621NFsyu","nonce":2,"parents":["a001814a7d243d76596a1fe560a3c46219435a452b13bbf009c45f3ffe5a8ebe","44b86fc57a64ae27a951d18e6ae1593c8e4384c04238682a4f07449663c2c439"],"ts":1792933620,"cid":"poa-mainnet-1","sig":"4YSysvaCuKnUUjwFWRqemk6RxxRnr6ULFNNHY3MB31KBysYQSBCNckwXL8YGZkwF6GxBwhuAp8rK2f4J15aEQ5Zs"},"checkpointed":{"height":67872,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T09:07:41.586Z","checkpoint_height":67872,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}