Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f66ba985959bdb6486349d4b5c8ccb4b0e45660a49287c45bdf73f86992503ee:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^