Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dcb51d843e1089816827e84551154449ad0bba0f81f2f55586152e05f4a7d23e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^