Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 102d2499c9c42a8ff5701ae17627cb2ad820c95294377ceb40a0c0083021f95b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^