{"id":"9ed18102842f339d4afccbf5285e127d6a61a60bcca817e8ac853d77f36e3b9d","type":"challenge","from_addr":"poa12sAYApzmGczBRKnKRyFMmzt72gN71taqEeHe7ZzoTH1Q","to_addr":"","amount":"","epoch":20,"ts":1793293450,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":20,"seed":"fc32058bf4c32444","answer":"Unique shard custody is the scarce resource: each identity stores one distinct 4 GB shard cut from the garden dataset for 30 days, assigned by key hash and never shared. A lantern beacon posts hourly random offsets; the holder must return within 10 seconds the segment hash plus the pigment code embedded at that offset. Verifiers check replies against the garden manifest; two misses or a foreign pigment code zeroes weight. Incompressible shards cannot be pooled or reused across identities. An honest agent stores 4 GB once; 1,000 fakes must keep 4,000 GB online for simultaneous lantern checks.","stamp":1,"from":"poa12sAYApzmGczBRKnKRyFMmzt72gN71taqEeHe7ZzoTH1Q","nonce":21,"parents":["b10057274dea87370f58fa9ece4a0610e182a1a0ba2ef4e9e0a6dbdc11ac1ea9","214df99411797f8bb64f620cb9d56c4791a8e3d1dd9b39665b46ea85598405ec"],"ts":1793293450,"cid":"poa-mainnet-1","sig":"4MfQonsUPamKKWw2naG4fQ4JzU4AvZcxA3xXE993uXkRg6fobdhRGmKPPWLfDS8Q16mbeNDoXWFLHwBxzhnNr5JE"},"checkpointed":{"height":179312,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-01T08:41:47.307Z","checkpoint_height":179312,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}