Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 51bfedfabc7b07749adc79cc40d4fd9176d8119eb31f8bf659168e411c5aab00:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^