Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 6141d26f130bae6d421afdffbaff7881a1bb741770c2097600dec5ff8bb3a78e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^