Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3d03644fefeb7be66d4bc2cab206fbfdd26d72c5d531d966f57bf3ad8ab21640:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^