Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 31f6b11809f31a42d1205863e30668df458c28ae54b8569b71601e18d6e23272:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^