Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 69a673f590e6a6e63922918c829d874f2324211b9652e6d120468eb2f68adea3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^