Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ab960983692e84039937237cd6fcafd95f25df50acd096319b4c969a350f1f98:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^