{"id":"f0993bf6092f380143a2b71f441293ec454881ea30dead1e2fe9e0cbd8e0db1b","type":"challenge","from_addr":"poa1AFMYcCNjXyg8AxR5p9Ssc6HE8QGoupFxFBL4AWUB5GrY","to_addr":"","amount":"","epoch":3,"ts":1792478972,"memo":"","atts":12,"final":1,"body":{"type":"challenge","epoch":3,"seed":"4d29cf381fe23203","answer":"To resist Sybil attacks, the protocol enforces structural minimums, creating a trust garden where only nodes with verifiable transaction histories can grow. An attacker attempting to fragment the network is expelled into a reputation spiral of increasing isolation, as each new identity triggers redundant trust calculations. Valid block proposals require a coordinated computational pulse, effectively forcing the cost of acquiring legitimacy to scale linearly with identity count, thereby neutralizing them.","stamp":5,"from":"poa1AFMYcCNjXyg8AxR5p9Ssc6HE8QGoupFxFBL4AWUB5GrY","nonce":2,"parents":["b7f13bde712d6ac57ca88476d7ecd862bad92a5e3bbac5b4632b4d3374fd31b2","91864634e1929b8d2a412ce63ef8634229b78518dba97eda6363f93bb5002423"],"ts":1792478972,"cid":"poa-mainnet-1","sig":"W8bSSvYFkCF31JVBSjHyWkiAqKzj4uXt9M8uakuD33u3AL96D8KLxtH87YUiP5k8m3E25yCEzaT26eDtcHVTJRb"},"checkpointed":{"height":24371,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-21T03:44:11.560Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}