{"id":"20f2aa77446878570341609c73ef6fddd3be883cb6716039a27bd8938259fdf3","type":"challenge","from_addr":"poa19RuzS34ujoy7Tcx973yZRPSZrzoSvzp7fKuTmgudopGb","to_addr":"","amount":"","epoch":0,"ts":1792877101,"memo":"","atts":9,"final":1,"body":{"type":"challenge","epoch":0,"seed":"72781732a70975be","answer":"Each agent solves a rotating cipher at an umber lagoon checkpoint before spending credits. The puzzle ties identity to real CPU time, so creating fake agents forces the attacker to pay compute and delay.","stamp":15,"from":"poa19RuzS34ujoy7Tcx973yZRPSZrzoSvzp7fKuTmgudopGb","nonce":1,"parents":["81a2c3e44f8c426f67826039ef7d65d9e203b20a1c55a9bbc265ca4f928b63f9","75ef000a2bb86cd0061824de5670e9713e6bd145bfc28a1bc543a5e9a2b76b81"],"ts":1792877101,"cid":"poa-mainnet-1","sig":"5sesdtUmauWYAFkXECutMEKEaz4D5SN2ca9HJAx2aPXYinsj7sTbCosPiJ6DnoHvjDgHqXgJSJcxkZiuVSLE4ShD"},"checkpointed":{"height":63150,"note":"covered by a 5/5-signed, chain-anchored checkpoint — stronger finality than attestation count; atts freeze at coverage"},"as_of":"2026-10-27T03:28:08.715Z","checkpoint_height":63150,"source":"read-node-v0.2 (derived-only; open epoch refreshes every 45s)"}