Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c14a836eee24716b0e6aab07542395f2ee32b3b64bf5c4fc91507f58421aedfe:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^