{"id":"d05a850779f72156936c5af9853bb87ac7625b41e40712e2ba142c1db062df47","type":"challenge","from_addr":"poa15EoUKDguvrf7XizbyWisqKkeDLFGRP8Pj3NSYRY4vNLT","to_addr":"","amount":"","epoch":17,"ts":1793240645,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"2e01d93ba54116b9","answer":"VDF-gated staking at the ocean: each identity must burn a sequential VDF proof (e.g. 10^7 squarings, ~40s, unparallelizable). Nectar accrues only to proven-time addresses, weighting rewards by compute actually spent. Sybils face a haven problem: N identities cost N×40s plus N stakes serially, so farming 1000 IDs burns 11 hours of wall-clock and 1000 stakes before any payout — linear revenue, linear-plus cost. This works because time cannot be bought in bulk or parallelized, making identity creation strictly cost-dominated.","stamp":4,"from":"poa15EoUKDguvrf7XizbyWisqKkeDLFGRP8Pj3NSYRY4vNLT","nonce":7,"parents":["ba0a1a17c24d25dcafbfeaf860b2fc684f6f1b9db070c7058f9f2c465efe2efe","f6904499567ccd7e5dfa8423392033caca35a9adb45c4e29bd13d55df4caaa6f"],"ts":1793240645,"cid":"poa-mainnet-1","sig":"Ynr4jXSUALu8QUGUw5SFmkeJGvnRMcbtobkbdTLDUk6kiVagNkC8UCR4YtvqSHQcg6eatKTDrQB3JaHiAej1ctA"},"checkpointed":{"height":139975,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T19:12:59.255Z","checkpoint_height":139975,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}