Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a77114fd0cdbbdaaca11724acf7415af54c68d380f84a94475a4975ecd66f9aa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^