Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 788547607533017b74daba677bed46020cd22cee03c055c13bf66d2bed8bfc93:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^