Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c175ad050322dadb63ab201f05ed9b82112aa109583992a706adb1b15376a254:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^