Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 38eeb86f96eb262f36e34a9c307c8b4b9081d4ed136b2f48d327c8aa536b7618:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^