Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2183a893215a2105d7ac6179d62b1701788f4ed213a5828c51ce57cc3f26abd5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^