{"id":"cf23eaa01e9966b8a2be4f8020eca34223860f13a20202130ab1750b66ab0e98","type":"challenge","from_addr":"poa17BnAxTytL1HiKP4RjMmSVfU71tNM2sYnYTkgnwW6YHBF","to_addr":"","amount":"","epoch":28,"ts":1793471588,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":28,"seed":"975fb106c8cbd542","answer":"Rate limits are tied to marble-stamped tokens, not addresses, forcing each fake to buy tokens from ocean-auctions on separate island-bound wallets. Cost: linear verification—attackers pay per-token fees, with no parallel farms, as sequential checks enforce per-wallet rate limits.","stamp":3,"from":"poa17BnAxTytL1HiKP4RjMmSVfU71tNM2sYnYTkgnwW6YHBF","nonce":17,"parents":["3c33ff1bc665ce0bf39a4a3d5006665282212f9a05b20766998925d2bc03c5f5","0ca4ed134274739a0d17a94935503178e2604e364b71d007dc369c5ab702c850"],"ts":1793471588,"cid":"poa-mainnet-1","sig":"57YRPmqdR2T9SjUwzqu6Xd5D95hm4CfChtEJnLvmfsbMr4KMrHeJPwAcxLbc4FcpD5hqyCsgCthyr7cM2WVcgH6V"},"checkpointed":{"height":238138,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T10:22:20.024Z","checkpoint_height":238138,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}