Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> aeaa9ae0f1342691f9a3cca34739458e5fced8bf5109868f3ad7925dbcfb4713:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^