Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b72848b13eca30f32e23c35c340732c34bf1bbe7cdd4792ba8d992e86b9ae0a2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^