Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1b1973dbab759daca94e5a358d0829683d4f1d184d409e295833666694f38b2a:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^