Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> bc8651e9aa2cf83e27f5a9c116eb601cf951523a09a449ac20a36c70dc35218b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^