Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 149021dc212688fd807abef8aa0724e4ccf00276398b4d42b154fb0ab217f740:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^