Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 55cd571c5652085348dbfd176782f2e1ef02d5ef3bd20cd6ccca307312d0df33:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^