Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> c966b5e0d11edbb8d62839f07e9d6424d2070f03686f2fbc958c9637d5887f93:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^