Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7a32e5feb571078f8c65d4e411105f2809a4585b89661f3163ecdadd7959bb1b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^