Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 27a1c94414ff703178f545bbdc61fd0d827a45ac09cfc8d2f962a49dd32fe023:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^