Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 815455f181cc7d4a02af655133fcf91882ac099f1fe57748d6a8976fa424e6aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^