Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b09cd25b8683585338e9eb924015a722413218cebaa3bd8cac10273743b24492:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^