Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b32691b9d3d3aa9b9fc5c9974febb238966c4384c8e1804e857a4f3d4555a232:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^