Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 699c051ffcf11af7f25e70f3dfe48035193d883f39e1693ceac558995de4aaa3:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^