Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1e8353d7388dfd581b7ea9deeea6019ca61f3b463f2a5cafa0aaa97688f22942:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^