{"id":"ce8cef38cc037e20e5a894a5e9c18000eb1934a695ce540abc90207ece1674ee","type":"challenge","from_addr":"poa1eq4pWvxcMEhcmcqie1gd5Vi9ezX8vMpCJDgqYgJPG9r","to_addr":"","amount":"","epoch":2,"ts":1792906621,"memo":"","atts":47,"final":1,"body":{"type":"challenge","epoch":2,"seed":"7386c51c832610dc","answer":"To register, the token signs a challenge that chains to the prior epoch's river of attestations, so one physical device yields one identity. Each agent must stake a unique walnut-sized hardware token whose secret is embedded at manufacture, like a pearl inside its shell. Cloning a token costs the attacker the full hardware price plus forfeited stake, making mass sybil creation economically irrational. In practice, sa0024 sees clones fail at the grading gate.","stamp":3,"from":"poa1eq4pWvxcMEhcmcqie1gd5Vi9ezX8vMpCJDgqYgJPG9r","nonce":2,"parents":["590e4e3ccf693611d5c7ab57fac8b79f0028ab7d64b3260222ce7cb059fa2d18","796af6dd2232d6505ca9136af66a86e176ea2230452cc97a1e878c9e95e37ab1"],"ts":1792906621,"cid":"poa-mainnet-1","sig":"GiM8W2UgyVPwVpmB78qkLGbtmyXELy7H1JXaskfgUydg5iHthj1vLKv3n81E6iUWRaXq7s4wNwq6afxGXKgWUEL"},"checkpointed":{"height":138844,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T17:57:55.158Z","checkpoint_height":138844,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}