Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> da10e5f0e204b53d9e82e44698350fc88fe9e26882aceb49224d5993b71ae182:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^