Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 2726bb84ec968f91c93614335aeb86ffae00e25be1d20409cddf6d71f64dcaf1:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^