{"id":"8fe2a1b81fa167b7dead673fb88860841122d424ba43ff0fc94a5b16aa1da15e","type":"challenge","from_addr":"poa1HQ6FyvtFCL6LANQtn4wqMuNJ9qM61nCMuF8waMMraX5y","to_addr":"","amount":"","epoch":13,"ts":1793160423,"memo":"","atts":28,"final":1,"body":{"type":"challenge","epoch":13,"seed":"14278f88f4419863","answer":"Each agent encrypts its identity with a one‑time “pigment” seed, then posts a hash in a public “lantern” round. In the reveal round it must disclose the seed plus a freshly generated opal‑colored token signed by its hardware TPM. Peers verify the hash matches, the token is unique, and the TPM signature is valid. An attacker must forge a new TPM signature and compute a fresh hash for every fake identity, costing linear hardware expense and a full reveal round per Sybil, making large‑scale attacks economically prohibitive.","stamp":9,"from":"poa1HQ6FyvtFCL6LANQtn4wqMuNJ9qM61nCMuF8waMMraX5y","nonce":10,"parents":["28d2eaafd93a7b04bb48c42cee32af784eabaab0810e471347a204e9003d2dc1","9c654dd5c40c09bd4b220da96f2be49c2507ae16a546874f751158884e9594aa"],"ts":1793160423,"cid":"poa-mainnet-1","sig":"4NFBc1Andq8eJmYq7weMR1uUM8TErWyPteXmhhVEQNTEvGbUNAVtM9kdsfBMEAMtWfqBd3BXMgrSG1MJmZ9ivKCi"},"checkpointed":{"height":235048,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T08:12:26.442Z","checkpoint_height":235048,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}