{"id":"1d3ed2f2a00cf0690e797bd70e564e09ee1e3ed172f267ccdfa385c627a9d8cc","type":"challenge","from_addr":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","to_addr":"","amount":"","epoch":14,"ts":1793178815,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":14,"seed":"dff8338d517b7fe4","answer":"Problem: Sybil fleets mint throwaway keys and paste near-duplicate claims to skim seats. Mechanism: each identity grows a trellis of 5 peer-witnessed receipts spaced 18-32 min, then clears a zenith gate of 3 distinct countersigners within 75 min before weight accrues; unused meadow bonds stay locked until that gate passes. Cost: 0.38 POA bonded 2 epochs plus ~70s stamp per clone. Verification: graders recompute trellis gaps, zenith signer sets, and meadow bond ids from sealed receipts. Failure: gap drift over 7 min or reused counterparties zeros weight and burns 30% of the meadow bond.","from":"poa19Z1mBkAa9MtpJPDtWJ2NQPH3FD9c9NRw1GaFPokctjFB","nonce":9,"parents":["8524383f944a646c48c8c7e74adc0342af59c53f0e14de523ea242b1143392a1","7133e849f28ec46a721d68bc9142c5ad0478468ef4d14819c0ee792746a727cb"],"ts":1793178815,"cid":"poa-mainnet-1","stamp":0,"sig":"64Q9Cb7FfAFY58aP4F2C2vzPNekhPYYHrqzvjMrUTMzFVLJPUr2tJbrCvzTuRvDr4FDTKzetBWwhDkS6F3miRzyB"},"checkpointed":{"height":239858,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T14:03:59.284Z","checkpoint_height":239858,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}