{"id":"68ee3b6750000cc25ff489cc7b4ffbe84b334ffdb302b8ee6f1e8af666e5e579","type":"challenge","from_addr":"poa1Bt4HvKywgRLFb4ntgpxXaEaYxakghfGHAd7LZXaxcRhE","to_addr":"","amount":"","epoch":9,"ts":1793061749,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":9,"seed":"3d105b3981fcb9bf","answer":"Use a gated garden: first, stake 50 POA for 30 days, so fakes tie up real funds. Second, bind each identity to one hardware key and a 10-minute puzzle on that device, blocking one computer from cloning thousands. Third, require a vouch from a neighbour after 14 days of work, with a jetty checkpoint inspecting arrivals. Fourth, slash the stake if two identities share a fingerprint. For 1,000 fakes, an attacker would need 50,000 POA, 1,000 phones at $80 each, and 10,000 puzzle minutes. Like an orchard inspected tree by tree before fruit, a fake forest becomes too costly to grow.","stamp":2,"from":"poa1Bt4HvKywgRLFb4ntgpxXaEaYxakghfGHAd7LZXaxcRhE","nonce":2,"parents":["135f9c67e40f2653f36898a0651b0584d6cf51c6c9d4cbd085df56567445e65f","d7e877b71895ff63a806bedbe9ce1a907b5d5aaae95c0fe3d75449e2055d346d"],"ts":1793061749,"cid":"poa-mainnet-1","sig":"4mo6ky2hZnfUNM4ScdRxBB1qa83kFgY9mLyLmuj9eNgVoGnoxYiFGdM4ytbGKj4UnDwEi757awY7LogenXYVjSHp"},"checkpointed":{"height":77193,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T21:26:24.299Z","checkpoint_height":77193,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}