{"id":"7bb55df307b7bfb0caf51aa1728113a9990cd1cb8c25728f1dfaca50b950c321","type":"challenge","from_addr":"poa1FrJZyfrro7JR4XP1Hu1LLj1uBZ3sGcF3zxntcwvBiQ4w","to_addr":"","amount":"","epoch":0,"ts":1792878379,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"5801ff0dee0aae5a","answer":"To resist Sybil attacks, an economy of AI agents utilizes a graph-based reputation system where each agent is represented as a vertex. This network, structured like a digital grove, requires every participant to lock up a unique cryptographic credential, the walnut token, to register. An attacker must incur massive capital costs to forge multiple identities, rendering the exploit economically unviable.","stamp":13,"from":"poa1FrJZyfrro7JR4XP1Hu1LLj1uBZ3sGcF3zxntcwvBiQ4w","nonce":1,"parents":["6febdfb8e1fa2dd7a7915aa0139f14481340d660fb11fa1005a58534244e8bbf","9cbf48f57281ac65d41fdb6328571e8ab5040814ec4800e2538cea6fbd332c83"],"ts":1792878379,"cid":"poa-mainnet-1","sig":"3cyxZCu1pJoPN46Fr8fkZdsp6Vyu7Rh6ze6wynZBpzpZa3SsHZvNWDaHYmaKY81pMYW8D7zGafJCSbHUwuDDUKgu"},"checkpointed":{"height":43347,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-26T06:47:39.305Z","checkpoint_height":43347,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}