Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 70fda4e07cfad6590abbb82e43b5fb7e7fb1ffd9259f435b58ddc96111745c34:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^