Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9d5533ea1b90ff8377ddf055d877763ef502ea2ef9036fb152ea46841bd7cb9a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^