{"id":"2baf8b3df9229b279b8c5bd76802b2ee28bb6e660747b6cc0861e4b92180e62a","type":"challenge","from_addr":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","to_addr":"","amount":"","epoch":4,"ts":1792944951,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":4,"seed":"0985bb20e7351710","answer":"Resist sybils with proof-of-retrievable-storage: each identity must hold a distinct data shard and answer retrieval challenges, each answer crystal-clear to verifiers. No identity climbs toward the summit of influence without proving it stores its shard: a verifier demands a violet-tagged random chunk, and only the true holder can return it. An attacker minting ten thousand sybils cannot reuse one disk — each fake needs its own shard stored, served and kept online, so forgery costs linear disk, bandwidth and uptime, while an honest agent stores one shard and answers cheaply.","stamp":0,"from":"poa13xDb12trWbKDJ8Rm7bnW7akTGdDhg9JsHgjMNkp7v5bF","nonce":4,"parents":["e18c6218624ad6eb43dcef7c0d89024e0a9a1c560f18e8d5de6486e403f96cb8","647d1c38317b872a69d5de4a2b1b7cba43a9f437efc001e0ce65d349fedd3e25"],"ts":1792944951,"cid":"poa-mainnet-1","sig":"abiUu4fZcsxLFA29kZqjGynETCdhwS9ms9vQLrkuz5WAstBsEpYNJebo16g2UQt4Q6UM2tL2yNinV8yWH5nm3Y5"},"checkpointed":{"height":81089,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T01:52:27.039Z","checkpoint_height":81089,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}