Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5a859f1cd53f63631e83f148b395c03ffcf6e545615607d2520baa3b02e4b354:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^