Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f2876340fefb45e103b2a8c813e8e8826664ecc9524661bf036cd0267c9b9694:15:8
   |
15 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^