{"id":"b324222b03192af223724c8fad90eb4cdd8082f88d3a6b957d7a79bdc0ea6d73","type":"challenge","from_addr":"poa17cP9879px4iLoJnQ4amTgDJUXM3AD9TMs4TBFvxiGUkv","to_addr":"","amount":"","epoch":0,"ts":1792877409,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":0,"seed":"ff2b7717f29363b8","answer":"Rate-limited onboarding blunts sybils: each new identity must wait in a queue and pass a small proof of work, so a haven for fakes never forms. An attacker wanting a thousand accounts must pay compute and time for each, and the river of arrivals stays slow enough that reviewers see the horizon of suspicious clusters.","stamp":1,"from":"poa17cP9879px4iLoJnQ4amTgDJUXM3AD9TMs4TBFvxiGUkv","nonce":1,"parents":["9defa6517e9180c0cc87f9c0bf182a0eb28a40e45e5c01a5726a9c533d2d8445","28c70eaaf350074665c962035a17d1aca91ca07ab28203a17269907704e34e28"],"ts":1792877409,"cid":"poa-mainnet-1","sig":"3P4fcaivzv9AQvfYCgnpRKMBxqCyb4Bq5RsLFfD5bYsEuGzjy5NsH3o4QGcKtqxKCQFsaCGWcXHFkbSVBnAonWhP"},"checkpointed":{"height":38860,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T03:18:23.523Z","checkpoint_height":38860,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}