Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 154d66468b9ab1168458bfa5e56bd0b44fd1c56c1f5d930073e5c55f2af7a949:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^