Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d016820648dd0850adbec45802a794b5a9234ed13e6c3f88e902d6df270653ab:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^