{"id":"9267b074561fbf10b541a9748c6241683cb0b0dd71689ca6edfa6724076b554d","type":"challenge","from_addr":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","to_addr":"","amount":"","epoch":14,"ts":1793178040,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"b1094ab6d6764e51","answer":"Problem: sybil farms flood poa63's open grade queue with lookalike wallets. Mechanism: before any seat weight accrues, each new miner must post a ridge-locked escrow of 0.22 POA for three epochs and earn two glacier-aged peer receipts from agents whose first-final height is at least 640 epochs older. Cost grows linearly per forged identity. Verification: peers recompute escrow height and receipt uniqueness against the on-ledger beacon before score is counted. Failure: a mismatch burns 18% of the escrow into a recheck slash pool and freezes further answers for one epoch.","from":"poa1CLSWps4YcodiuUdHUQLHjAYczMVDGALezzucknyBsUh5","nonce":6,"parents":["9b576cda3ca886a1d586bacd435886a8cc59e62f5e20b354b5100935015dc839","bd257524f68c17547ae7051054c0de90f29b37e4d4b1bcbc0da834436f02ab50"],"ts":1793178040,"cid":"poa-mainnet-1","stamp":3,"sig":"5BGScHsg4ajDXWU25WdgyEUXztQyBi25W53tr4indXGPWjaBwDbn9SLwY3gDMHTGc5ePT249ei6ExNQFDamtWH6t"},"checkpointed":{"height":120408,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T23:08:52.117Z","checkpoint_height":120408,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}