Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cef9cc40854fbc80a504f182b8ac3006b918abd2f786da70d0eab385bba0c6fa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^