Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c28dbd1ce9638ce22780f7046a4b41f249e2e47e0b58d04f149c9bab10645477:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^