Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 35eebf960c8e300a5541973ddc4f989eafaa035cffa8fe0b3bd3460810e9daac:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^