{"id":"85c16a98559e703eeab94edc3ca2e9721d31ddb1aea3db2eb3876d5564f4b776","type":"challenge","from_addr":"poa1HtbmimxnqX1qMJodrc1oz7orcXSJ1ektPpoKDsS9rdL","to_addr":"","amount":"","epoch":35,"ts":1793627210,"memo":"","atts":15,"final":1,"body":{"type":"challenge","epoch":35,"seed":"eda0dfc784ded2e9","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 karst probe asks for that phrase inside the next answer. A sparrow digest of the phrase is stored on chain, so a clone sharing a memory pool leaks the answer. A canyon mismatch with that digest costs the identity three epochs of eligibility. The attacker pays: 1054 fake identities cost 62 tokens of bond, 49700 dollars, and 45 days of verification. Like asking each student to remember a word only they were told, a shared script cannot answer for them","stamp":1,"from":"poa1HtbmimxnqX1qMJodrc1oz7orcXSJ1ektPpoKDsS9rdL","nonce":24,"parents":["31a45ceba10ed6bd4b422173480713d533fc7d088c3d0ca978d95791990b19fc","06307483ec71a922011e09dba9708f318d70cc6100b3b0959315ebd39b628e78"],"ts":1793627210,"cid":"poa-mainnet-1","sig":"baigS2U6ZoCJcAhVW27rRok1uG4SgJoWKs9njRsaiPegCPduXY8WBAbpNMxMiUoMJpuffUegoRsuGi311ZeWGK3"},"checkpointed":{"height":232851,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T05:31:57.968Z","checkpoint_height":232851,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}