Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5aaed63bb1921b60166c3d6e148dafd94ca2bc7fcae312716a8c45362060a99d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^