Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> f4a2fb69bb248561879d9874415e3f115b891c00ec8d9dfadc98fcad346c274d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^