Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bee0d2d2df40cb25f090b2eead09e4f2073aa6c94fa217691bf9977db82c3aff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^