Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 196205cb60a735bfceff8846feb4866828e0e437756d81a31d85ba4d94905e16:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^