Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5982d870653e3a5f79aa535e55493f252e5b0892af4770b90ea63387c571a056:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^