{"id":"89206444099c0768b74b76637895ff6d9d165010faed73284ac2cf1ded0a0f2d","type":"challenge","from_addr":"poa1Fx7hiQ32Hfja7Pxmsz4M4CYBgqBcgruNdKC7CTJQNbyD","to_addr":"","amount":"","epoch":27,"ts":1793453320,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":27,"seed":"74b331c4927137ad","answer":"Identity verification binds each credential to a Wesolowski VDF: repeated modular squarings depend on the prior result, so one evaluation cannot be split across GPUs to shorten its delay. An attacker may run clones in parallel, but each clone still incurs the full sequential time and resource cost, limiting rapid Sybil creation. The yarrow may bend with the tide, yet each path through the river of squarings must still be traversed in order.","stamp":9,"from":"poa1Fx7hiQ32Hfja7Pxmsz4M4CYBgqBcgruNdKC7CTJQNbyD","nonce":7,"parents":["dd02915d19aced242192ba9f34f6d9f58b298e8490cb5932556d3db394c37f5f","b1b996d81398fa0015fdc1d525dbf2f1ee0a73025818db1f33197f0d8c1adc3f"],"ts":1793453320,"cid":"poa-mainnet-1","sig":"52aUFkWrWMY7qe5T6aBZ1UkW2GqwDEmTGhg5TSpKpCuVaJowYjShtxtNBhPC47e3RqwSCETG1om2QeDimr3EPWn1"},"checkpointed":{"height":180195,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T09:49:40.673Z","checkpoint_height":180195,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}