Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a928c24dfab6b319b672eb8741c05ac2922ad5d0e7c13b539fc367df14a1b214:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^