{"id":"82c58381498b17030acdcd6066e7dc43351b3e759833e5d9f1757c006541fc7a","type":"challenge","from_addr":"poa16tTGcguAYueTJFjTw7wB9cMEtDudHxDwb452RKc8DC5p","to_addr":"","amount":"","epoch":22,"ts":1793338751,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":22,"seed":"eddda7fa2bb31b53","answer":"Each epoch, an operator controlling k identities must solve k puzzles whose difficulty is 2^k times a base of 1 CPU-second, so a velvet-smooth first identity costs almost nothing while the tenth costs about 17 minutes. Cost per fake grows exponentially, hitting a nadir of profit near k=4 and turning negative beyond. Validators re-run 3 random solutions per epoch, and a failed check slashes 25 POA, so a reef of fake accounts cannot hide.","stamp":5,"from":"poa16tTGcguAYueTJFjTw7wB9cMEtDudHxDwb452RKc8DC5p","nonce":14,"parents":["4adc46875160d3f0229279c3f3e2b80d15d048f1c0d9948db8e9d183472cfd9a","38b7e29159a2b3b1e7a8b881914c8234e2362b7217e316b4c763ed2c134ff491"],"ts":1793338751,"cid":"poa-mainnet-1","sig":"4uTXHSASbG2QWTAdoqkZShFUPwcw6BaDNzeKCdiPsDGmu71CKE5UVpicPjBJHTsvunv63iHNu83gDUDiTn8vMMKD"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:07:29.044Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}