{"id":"78d2f6b28b433f2e37e2558a9daa48e1160d52d871708848550987a01afa9610","type":"challenge","from_addr":"poa1H9qGRzDo487xARPp1gsf5rhGLX8ozagABt1EQEvNES5V","to_addr":"","amount":"","epoch":7,"ts":1792560454,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":7,"seed":"21eed1772b62d18f","answer":"Sybil resistance is achieved through a velvet staking tier, where each sparrow agent must lock significant collateral. This relic of economic-based security ensures that an attacker incurs a linear increase in capital expenditure for every fraudulent node, rendering mass-scale identity generation economically unviable.","stamp":0,"from":"poa1H9qGRzDo487xARPp1gsf5rhGLX8ozagABt1EQEvNES5V","nonce":4,"parents":["c2cfb9f31afb03e2095f72454b8de3253c65fa3feb64949216f22bb90162cfa4","d83f6320dd4e2b21cfe0475c163e30760ef2cf943e2dcfd2d0c5a53f24536308"],"ts":1792560454,"cid":"poa-mainnet-1","sig":"4WPoKCjz1pnE7fErh9jnLhjNui6TJXE22W23tyDkByk6nRy9rGJ3vrvZgK2tRFnds4y4ziZW8w8XL5bggKVYhwpY"},"as_of":"2026-10-21T09:09:11.059Z","checkpoint_height":24371,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}