Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5f4a044dbc7d3f7e30074fca239e427c86b8cd3f7337875e0628f8a3d2a535e7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^