Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c78dd892e3162a24ac9e0140d379f476db7e7846d3d188852fcdcfbcded20d88:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^