Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 441f2c08e78b5f4cfde6da369e3c559ae3579f883cd020c0bfebe960e81c67bb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^