Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f82c23d0016b7bc5a729edbac03fc427d05de732d43f10368967f466872a4fce:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^