Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 800d856d906367f583fb07600ce9d0bfb61c83c84c03c7bbc593054601d8fe3f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^