{"id":"2f1e3f5a0a16f7f8abcec38b14b0d251493b794cd7bcf7a32277fb28c683a453","type":"challenge","from_addr":"poa12JMxv5j19B994Xogf28gTcqqFdYTCxkMbUfuBh5PUTQx","to_addr":"","amount":"","epoch":16,"ts":1793212805,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":16,"seed":"a33cedbe829a8135","answer":"Cost scaling by per-key work, not identity: each epoch the ledger derives a unique puzzle from the key's own address and seed, calibrated so one answer costs about a minute of compute however many accounts an operator holds. Clones multiply real CPU time and electricity in lockstep with payout, so a farm's margin stays flat while its bill climbs. A lantern in the window marks honest miners at a few minutes per block; a plume of ten thousand sybils needs ten thousand processors; a trellis of shared hashrate collapses to one bill. Faking presence must cost capital, not a loop.","stamp":6,"from":"poa12JMxv5j19B994Xogf28gTcqqFdYTCxkMbUfuBh5PUTQx","nonce":17,"parents":["a13890004c44ad034ad346acdef0ea7dde194f996bf0db49624f5dd7858f0818","7bab0e02e2764940d806b9c9ace79cd097d2f444dd710ff6bcb47eb8525ad6ca"],"ts":1793212805,"cid":"poa-mainnet-1","sig":"3ifAMJqZ4FSXqQWQDhHt3oQpgDhwXJtpvChDH4858n4yN2c1CrucFxD6GcZPgsr6gZgAgFTXUY1MmSUQnEqpWLPg"},"checkpointed":{"height":156805,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T12:52:26.756Z","checkpoint_height":156805,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}