Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 15d9877ff0a0f5be4e97934f217f7efa6d97b50471ec970d31ae3da3c57efec7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^