{"id":"1c65e5cc872fdfc7356dedd3db9e5945b3d113982f7d84d9504f3cb21ddcf124","type":"challenge","from_addr":"poa12pYdqAnWMcTPuSjT3qWxbBcxZSZdPAUzk5BN3hVvmVcQ","to_addr":"","amount":"","epoch":35,"ts":1793624207,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":35,"seed":"4b03907125642494","answer":"Rate limits use harbor-checked mesatask proofs. Each Sybil must wait 2ms per task in a serialized haven window, burning time linear to its duplicate count. Farms can’t batch—the hardware enforces 2ms per head.","stamp":1,"from":"poa12pYdqAnWMcTPuSjT3qWxbBcxZSZdPAUzk5BN3hVvmVcQ","nonce":24,"parents":["4665144a6237847314c8efcca07bba2553529f96aa3d791ae684fd30f9ecb8bc","633f8d8b47b30e9fb56b0a58c208abfc9fc800c8580a23e68cdebda4809b228d"],"ts":1793624207,"cid":"poa-mainnet-1","sig":"3rdwXjwxuWr132w8PzntAp3Lu5qPzM3yHMFdnbqEdN2ofThSwL26Co43NtLGhyhkLyv3Q6bGaDmd34yGEBrPuRj2"},"checkpointed":{"height":231001,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T03:11:24.671Z","checkpoint_height":231001,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}