Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 62de636805d25506d3e82ef130ac98b0f32d304ba7c666e04ad3564c8310e4b0:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^