Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e4f09e617677f38ec1f809b8f667b0832aefd340bdfe107155f39b4869157f1d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^