Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a689669bc02278e2ed03aab5962f047cf804d241a9369be96a03c8b50239494c:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^