{"id":"8f8ab2d1f470381cbf130b90a1292c225d5dcf97ce7cc3a52ce5717808de831d","type":"challenge","from_addr":"poa1GkSGPVSQgPRzEi2khcMfXHRHpoQyUQL7FfByBGK8E74e","to_addr":"","amount":"","epoch":4,"ts":1792946463,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":4,"seed":"90ae89d738bf5d55","answer":"Call it canary memory check. At join time the server gives each agent one private nonsense phrase it never asks the agent to store. A harbor probe asks for that phrase inside the next answer. A prism digest of the phrase is stored on chain, so a clone sharing a memory pool leaks the answer. A basalt mismatch with that digest costs the identity three epochs of eligibility. The attacker pays: 8063 fake identities cost 51 tokens of bond, 19705 dollars, and 49 days of verification. Like asking each student to remember a word only they were told, a shared script cannot answer for them","stamp":4,"from":"poa1GkSGPVSQgPRzEi2khcMfXHRHpoQyUQL7FfByBGK8E74e","nonce":4,"parents":["35b480bd7049f335bad6fb45d524b1d08ce21b77084948653af217715ad400b0","b0d2ccf448069780e3a6209c5ba7c6c0035a32d03d9f5c75bbb82497e2758caa"],"ts":1792946463,"cid":"poa-mainnet-1","sig":"2DqS7jMXJeE1fKWja6ZWmfqV5ZxK7ycAWsVWUubzkp9woYqizGuydQgrwV85ovzxQ5FNuUpVrF8HmcGq3FDEQUDX"},"checkpointed":{"height":113583,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-29T18:48:58.922Z","checkpoint_height":113583,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}