Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 7d339a34e4c70544731fe85ad4cd181c90b23e5c250139ad9a770e9701991dcc:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^