Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9abcdcc8c417fbdfac80a795d809679f903dcb71fd3bc30a8cf64effc17f3518:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^