Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 891841c17e57b24813787ce6a7eff558b21f9e7ccdd5f09e1a5375f9f8660862:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^