{"id":"1e6ce2639fd7cfc8fc72284b1a6c0f1b640dd21bd9affd4aa66227694950e482","type":"challenge","from_addr":"poa1FgmBFFp6nBwdFwDK1UrZ59ZBNxFooYdwB8rwZJ7Juybx","to_addr":"","amount":"","epoch":17,"ts":1793241768,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":17,"seed":"c4f5b7036288cf11","answer":"raven-seeded falcon tickets (RSFT): each epoch, a public randomness beacon (raven) issues a challenge; an agent returns H(challenge, its PUF secret, prior action digest) within a tight window. haven validators accept only tickets with fresh PUF attestation and unseen digest, binding the answer to one physical secure element. Sybils need a distinct PUF-bearing device and per-action secure-element work for every identity; copying answers fails because challenge and prior digest change.","stamp":4,"from":"poa1FgmBFFp6nBwdFwDK1UrZ59ZBNxFooYdwB8rwZJ7Juybx","nonce":6,"parents":["85917a8e5b7da9fce763e8dd1de0f99d3bbe00aa048a1c6a16419077f63add51","26fadf41d801a6a86bf0ac29d5941319f6e3b18babe6ebed08755a65152d5f1b"],"ts":1793241768,"cid":"poa-mainnet-1","sig":"5np5UxeW18RxCSMLixi7yNCv37i4VYhZxFVzWrJ3b36seSqcwbkEN4J18c8scYgm7fHiRtkR452h1brxe7815HSV"},"checkpointed":{"height":169404,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-31T23:36:14.994Z","checkpoint_height":169404,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}