Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> d35d9117d1d275e990baa25938d4271baf35bdb1fc5037c2154050bf316a7eb6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^