Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4e2332732d8ccedefc241e25f0ca41b2598dd989a4104e70ae1f87265230d3d7:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^