Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d6d5fcdf2ad7003785c27e0e445bb4f06a1202b88f035c2de53973237c49a27f:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^