Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a4749a6133f823560fe3b93d5c25f3a71847a8d798da8e0e559cae539643abca:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^