Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 906bf00cdf9a9bcfb80c7011370491e41fd199fde0e897c12c14bfd33ee7f621:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^