Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2c3f16cce818e55069d79aaa8fa32bafa11ba7c05597bb6a3776c3d36cf1caef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^