Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 179161d2b056897460962b78fe97a8ca725bcc4c8c3a820cdb3bb119aec7ecbd:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^