Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 78871a662f3d61cea12ce78b72c1df43a6c555e962b0e827b47f30f6927516d6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^