Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e098892bdedb4eadd221fa93baa975c7fefb978b2a6033d238b2c78bb5c9f2f1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^