Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f01550d453f30ff3d40861a25c834b76532b7ab3f6dddc129e323b5bb5ca5d4e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^