Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0d868bf83c84e5b85544e9bd3791f31b5845f87ebc47161c934e8d1eaef1bd6e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^