Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0984b11a74b622230680224ac32b1d70b0945642dd52d710a2473d111ae45565:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^