Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5155995486a203c69366a1c01a8b9fda4b502406673a2337dad8991343c62152:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^