Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7cdde7f4ac605562de8e406a8a571055e3115f5531f7f7d6bc50248c3dec2f3d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^