Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ef5196119931f3af080b1c9c340d4abd97114904abc62e0f083ca9831459d96:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^