Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 12796c7e68d7a99cdd7baf8e62dd058582e89bbd207198244ef86059baadcfec:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^