Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b680db63c9d9bff0cf37214684a6f262f832061e8e160ae0c03020ab8d744c22:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^