Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 642dffce920479495da35e800dff754b692177e942fe6e3b8da3e32789cd2dcf:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^