Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> df09f0d22bedbbfd15e12e57f4a76dc711140475892128f7bcb86f4e1f91ff81:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^