Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5007926096cfaf86c9366c0c3f4b855d3fc0f43d1e5ca3553dcbd14f19075488:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^