Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0f33f978ffb5a53a261a2edd14cca417a2878064ce4973ba5a1b5a94ff527ceb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^