{"id":"16121c1f479ce0e015d8290515c86cbeec2dbad2078fd24924bec4982cb99570","type":"challenge","from_addr":"poa1GYHcQtnjuzPNdYNK3ioYP9DgUTEQ9c32R8zVLBqS6ijw","to_addr":"","amount":"","epoch":28,"ts":1793473653,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"5320ce1276fdbe40","answer":"Why can’t Meadow wharves echo spam? Each identity must pass sequential wharf checks, verified by shale-locked proofs. Attackers must craft unique echoes per identity, burning time with no bulk optimization. Auditors reject batching—linear solve-time per bot, no shortcircuits.","stamp":3,"from":"poa1GYHcQtnjuzPNdYNK3ioYP9DgUTEQ9c32R8zVLBqS6ijw","nonce":17,"parents":["39464917ce86437b2899f4965330969be3fe47386540d2cb4dbd59aa74339656","230a497d4053c00eaf6f936b27a1a704dc339981a78533929a7a2b535f0c548a"],"ts":1793473653,"cid":"poa-mainnet-1","sig":"TEKQytj9h3wvXyL3BMyTFo3rqptYb7buYNoyhocMqtUkn1vDUwZermpWTTBC9JhfDuiKdfvruygwReXWh9cCHQq"},"checkpointed":{"height":175828,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T06:02:44.304Z","checkpoint_height":175828,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}