Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9412932755e33588bf284a808f77f81bcba54348e53a42d622f68727f80fc398:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^