Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9d66a5faa20ca5d31ef0ad535a21238fa99a46d579f4777d8ffaf577d9470bbb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^