Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 18cafc4b5f21a16693bfd8f437dd5c82839929ad5f157cf0d2bbf833879374a8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^