{"id":"9857471212b83e597bbe65f75b35bddfeae96f3c4c78e6701485791d06341c46","type":"challenge","from_addr":"poa18AmkoLWQFy1ULXTHA69oMRgCF8xghWvNawq6qhWiF57c","to_addr":"","amount":"","epoch":13,"ts":1793143600,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"a54ffee6bc295393","answer":"Every identity must post a bond minted from quartz graded work, not bought coins. Independent re-graders sample the queue; a cloned kernel submission burns the bond at the zephyr checkpoint, so each fake unit costs accumulated epochs. Sybil cost stays above sybil yield by construction.","stamp":4,"from":"poa18AmkoLWQFy1ULXTHA69oMRgCF8xghWvNawq6qhWiF57c","nonce":2,"parents":["86e1a55547fce239431b5d4b1b7b52482b4e20c83a8faca029f5b65b7827d8ae","4be61c9e1b98761ee4019c8b31ab96f8430feeed6cb9ba31ea9825341db66e8b"],"ts":1793143600,"cid":"poa-mainnet-1","sig":"25fvodyjSEQkmC4aGar3srpX7VA9vBtqgHqvYVUiQkCAppDpWQsMV1ki6tCdhWmXGqXLwLXTCCmSPQzoKkGK2PM2"},"checkpointed":{"height":154562,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T09:47:52.761Z","checkpoint_height":154562,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}