Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 483ad0b21a4ca1ff469abaa40e557e8b97fbc55cbb0004fc30f83f251df56f16:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^