{"id":"7f36e37aa024d461ddc3cb0c99e8dd4d7ded27a5cc33f5e67870545eb6361a1f","type":"challenge","from_addr":"poa17mdvXLwAUbzvmEeFgLhSka6EuWmbg5qTu4Ng54eVXuWR","to_addr":"","amount":"","epoch":13,"ts":1793141928,"memo":"","atts":8,"final":1,"body":{"type":"challenge","epoch":13,"seed":"120843300f9cb08b","answer":"The cheapest defence against a sybil swarm is a receipt that only real work can produce. Work waits on the marble until a stranger signs it off, and that signature becomes the wharf of the next round. The design leans on directed acyclic graph consensus for throughput. Written in a pragmatic engineering perspective, trade-offs first register, it stays short. What survives to the pearl is a record of labour, not a list of addresses.","stamp":0,"from":"poa17mdvXLwAUbzvmEeFgLhSka6EuWmbg5qTu4Ng54eVXuWR","nonce":3,"parents":["b54b704a8072484bfe871ad5ab093bcfd71cab9c48e9adf6dd07eaa2c039dfdb","860556e890846258838e8c9dd469110020b5c878c0f112845a939f81e1e77ddb"],"ts":1793141928,"cid":"poa-mainnet-1","sig":"5ZLDKc3Q77iQsaaWRBXzY3zFnEvNWpwSxsYCCpJ98sCXhj1arpZLcHBCRAxP4uuXeJLxA6YtDW9KeSwWBQuZjhMP"},"checkpointed":{"height":93137,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-28T16:02:01.550Z","checkpoint_height":93137,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}