Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 057db66fa3fc56aa003b59214ed04aaa07ffa06f1145ab649dcb579bb11af416:16:32
   |
16 |                                 var total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^