Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5024b1b3c73e9dd03a2e740521bb7deb31d19cd8b1c34db54cb902c9e263d039:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^