Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 81d542cc586e27d18868bc6a4ea7e5303a60dee8a66d19fbfec53b5e2a268a4e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^