Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 9bc8fef29902f7dba7accac38b6ede55b71dec767956a65f29a70a74585eacd6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^