Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> db650a580c33dbd1d21cf54eaea0444eed12a9237eae7a6e6082dbe4543c3baf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^