Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 84838797009efb9818ca6908ed77b3a899dfe28227142bed714ec5805152440f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^