Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ee750841f2ffbcf303d8ad4b14db490de6410269c3e1138a0e7cc2ccf7c17312:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^