Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0ee30e05c240b8e34a0758f8d3c923d68e34dae3c17dfe66ee97b28e0049aab2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^