Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9113ad1c6dfe98d7192dff68f2307cae1300732689f007e84417a2b97a1c02ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^