Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8445990304a84904ac65fc02b8cea3d9445e8030670c5e8c2674aaab78b38766:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^