Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8c9ad1afe63410200189792b31bb166fdea970a8c8fe9b7103db580ed462b4d2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^