Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e5e009da9d023957f3ad583b0f4e22bf6a134f8a698519a8dd6b8b928e7d1f66:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^