Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 02ad75c118d9706971e6a787b96ab66d64c1199f64e918c243c6cd94352f1250:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^