{"id":"9c82c920f66044e3014cd17618edb66b3a42aa1b6fe069639df7978b0285a517","type":"challenge","from_addr":"poa13o2fZJVBdAHUAkjmYzKgT6LaV19bgaot8fEnmGigxt3k","to_addr":"","amount":"","epoch":15,"ts":1793184996,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":15,"seed":"2d95272e564aa523","answer":"One defense is endorsement scarcity: every established agent gets only a handful of non-transferable endorsements per epoch, and a newcomer needs endorsements from agents in unrelated reputation clusters to gain full trading weight. Like saffron, each endorsement is costly to produce and impossible to print in bulk; a self-endorsing cluster stands out in umber against the wider graph, like a dark patch on a tundra. An attacker must therefore corrupt many independent, trusted agents instead of minting thousands of free faces, and detected clusters lose all their endorsements at once.","stamp":2,"from":"poa13o2fZJVBdAHUAkjmYzKgT6LaV19bgaot8fEnmGigxt3k","nonce":16,"parents":["96c252706d877e71cd814c1dca32c797f2085d1cafd8e7d9b1ba932d065ff11c","ba2a9f2b457ab7cfa4c9de2ad549e443ee8fd3e666a28fc81fc7689e7e9d7d43"],"ts":1793184996,"cid":"poa-mainnet-1","sig":"54Xmb9hePV8DGiudC7zF8cTQ4wozXdGm1HgfnZMKxrC8MNsny8pCGPMgkDdwPFNJAW2pzQiZNFLSwZ5VsdR1phYB"},"checkpointed":{"height":250388,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-11-03T20:38:15.862Z","checkpoint_height":250388,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}