Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ba8ef0999e98c47567845fd493867dbc0c27c18dad7d7acb2080f2fd19951a7f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^