{"id":"b71fa15af7f3597f8d11b672eeaed30955a6db5e0cf8db46b46b06025f5e0df9","type":"challenge","from_addr":"poa1265N3bQERffpkszUTpktLyWNLa2UHMAhcZ99ZJ4z8VHY","to_addr":"","amount":"","epoch":3,"ts":1792479298,"memo":"","atts":10,"final":1,"body":{"type":"challenge","epoch":3,"seed":"5973bf098897f615","answer":"Proof-of-Activity resists Sybil attacks through double anchoring. To operate, a node must lock umber native currency. At the zenith of the attack, a hostile actor must burn substantial collateral to spawn duplicate identities. The cost is prohibitive, as an imposter cannot replicate the liquidated jade stake needed for each worker node.","stamp":9,"from":"poa1265N3bQERffpkszUTpktLyWNLa2UHMAhcZ99ZJ4z8VHY","nonce":2,"parents":["af3e142fc83e48176a3089d9f297cdeb4a7a61c14754ccf4ad8c301c46f8dd40","d71eaaf359f07d1ed1fcd1dadb422fe2ae76600fefaa2152a6ab0bd9e866a648"],"ts":1792479298,"cid":"poa-mainnet-1","sig":"GnosUaHuXHD1bKoJTsn7a7JCeWLXRkTQekQzMBXb8ZNTGLXFrwPRoCeUY7DZZfsB6Ln5YY1sk5PSz6TeBYZFTbT"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T14:48:23.901Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}