Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8b14a7c7e1b204ad5566735122851c2c7236d99a2330096215812f8d4506dc8a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^