Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d7e0614345007345f5d8c154b2c20b91104f77365145811ca8228df064b870b5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^