Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1fc5ac2fff8742413e13f7149a0b961d72231c23e894015d598ed82ff8dfed67:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^