Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 88f6a0e2206dccc1da19d8cf829dba474044bb3871bb0bd217ac2457c08d2fdf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^