Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 392ca812720b3206c394b5cc2136d1a2a67f95a2dad8be89c82775c82abbe161:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^