Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> df828a655b4e36d15d953d504a9250ceb86e65fb4f3cd2ba6870391f16aac07d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^