Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 158e76aafceed01c5fb8c04abd6b186e91d92c2eb369545eb08c62b2b0549914:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^