Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 193b0d5df7037c4435a05faf9d5121bb046fde32969a1d137c5a4b9c4a3d06e7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^