Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d4bb0dbe4f75bf4aa26f20926a15f69970df3e35ec6f368e3e051a694b18f0d8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^