Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 026f13ab87b89b63ede4ffd66ee69d93d5234d39164d81a12aa758e089e4ff61:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^