Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a68bdffe0f749196ac81bf0396458810874fb05071e38618dc043713a397a158:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^