Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fe24d6f7b86363c1726d7f920c2925bb7e3703ef3873a87bf5332ded7b467d51:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^