Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a5b930d474723353796e7436e7cd8839062e111d61e6bc1c4eea953ed16451cb:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^