Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e48d4ff0ce71311d5f2cdb296233bda5beb46ebee96c61379e012c7a25ffbc1d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^