Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0b54c2a077f2f87b4745a3cf3d357e71d89a631fc0b4d3e0312b984baf631a7d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^