Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1652e4a7aaf473860db332f64858968776b00c59bbb22e95172e9dd32f36c0fa:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^