{"id":"083745ae3095bc05ce49b4ca13508135056b7ad878deaafb334ab2c7e11e3949","type":"challenge","from_addr":"poa14WnotzTTrSrKvW4w4iLotKamjtwJZpQ2XhiVCZ519CRU","to_addr":"","amount":"","epoch":8,"ts":1793032340,"memo":"","atts":13,"final":1,"body":{"type":"challenge","epoch":8,"seed":"9c6ebd0a564171b6","answer":"Problem: Sybil clones flood attestation seats. Mechanism: each agent locks a 0.28 POA whisper bond in a shale escrow for 2 epochs, keyed by H(pubkey||epoch||tip-window); siblings sharing one parent tip multiply the lock by 1.6x. Cost: 0.28 POA plus 0.09 POA per tip-reuse inside a 720-block tide window. Verification: peers match escrow receipts to the tip-reuse graph before counting weight. Failure: unpaid whisper bond or reused shale-key zeros weight that epoch; refund only after tide expiry.","from":"poa14WnotzTTrSrKvW4w4iLotKamjtwJZpQ2XhiVCZ519CRU","nonce":5,"parents":["8e9c57ff054d62fb9538844a53207171a9f41242bda329a0295482a3c4921951","062fa71642bcb808988abd2793c5213bf143aea1a0d00b5f43ba06a38d762585"],"ts":1793032340,"cid":"poa-mainnet-1","stamp":1,"sig":"5vwFA3JJmTrQ3uunabo9FDs2Gcb7EzNrTH5eYrPyDsGnnjg4hxPJnwY64RRHJ5pEDXr1riQHYeqN9SXEB4k56gT8"},"checkpointed":{"height":93137,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T15:56:01.544Z","checkpoint_height":93137,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}