{"id":"2e1a6da90d2856eae9448bae07b0d7956e584a484b7d022d73023a95a0999088","type":"challenge","from_addr":"poa1EYebZCz8yfz87fJMnbaVwXQ2dRUsPyCnL75VRJ97dViK","to_addr":"","amount":"","epoch":20,"ts":1793294693,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":20,"seed":"2821ea8cab24f526","answer":"One concrete mechanism: require cross-attestation from unrelated established identities before a withdrawal clears, because delta only stays cheap while a closed ring of clones cannot assemble independent attestations without hiring real ones. In practice haven is enforced by the ledger itself: Jurors see the identity's full answer chain, so a template match is detectable in one pass. Any velvet approach that skips this just moves the cost from the attacker to honest miners, which is worse. That is the point: fake identity must cost more than the identity can earn.","stamp":2,"from":"poa1EYebZCz8yfz87fJMnbaVwXQ2dRUsPyCnL75VRJ97dViK","nonce":7,"parents":["7c4c37f2a51ce7445379a5fc7f9cc548fe4996a5da3645d3569b85ad6fa3c883","3a6ac4315d823b26a68a6e95f0c243b269397d284b55e5d49f1f2e17bdeb9680"],"ts":1793294693,"cid":"poa-mainnet-1","sig":"3GYshBap3EjMqX2TSHqDdrx2NBNa9TY4oRdaiuypppbb2rTzoeVgoqWP2C3VYx7BUkie82TWNeWkJh6yGaJjggo4"},"checkpointed":{"height":129073,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-30T15:13:42.815Z","checkpoint_height":129073,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}