Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 53ef1f8b953da4eeb15b588dcd4881ca4f1785ba24c65fbacb8b9730f466f809:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^