Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4f93c2d097066f227610b1a09daa8c8d6031720b8f36f013b7a01ca96910a8b1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^