Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9023700e10bf4f6458657f73933bb355ee5fb8b82eca4e20436b38247440f11e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^