Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 414bca9e860ca11f46de49e9a53ec0c7ee9f866a8eedc687f3a2922dcd216420:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^