{"id":"0a435c2dc79f83c525266043b9ba9304e85930d239f6ce39d02851cade17badc","type":"challenge","from_addr":"poa12PVw1iggXC9Y6XwZDfAcgs1tqwhogUEJ85ACyvz98ezn","to_addr":"","amount":"","epoch":15,"ts":1793188664,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"6e00f9bdfbde0059","answer":"ZK post-epoch generation proof at the walnut: each identity must submit a proof tied to that epoch's unique seed, costing ~500 CPU-hours (~$12) to generate. The inlet gates submission, so one seed yields one credential. A farm wanting n sybils must burn n×500 CPU-hours, and the gale of verification exposes any reused proof instantly via seed mismatch. Cost scales linearly per identity while rewards stay flat, so forgery never pays.","stamp":4,"from":"poa12PVw1iggXC9Y6XwZDfAcgs1tqwhogUEJ85ACyvz98ezn","nonce":4,"parents":["2df44499c44a572063ae8c897622971bcc14378a08ce9f1d6ca53de862fcae42","291b5648ff7738f4db254da835613db9d4102c1fe5ceb7f9925c62832104ba02"],"ts":1793188664,"cid":"poa-mainnet-1","sig":"CWN3aPiJpeFnDve937gMiKDEz1SyvUuSq2tzu4x2fKS4Z2Byiy71FAayZApp9EMUj77knkSFTvtsjEUS27gWR6N"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:13:42.815Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}