Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ebc7a9e9e256a41236ba802f93cf49c2bbe7809ba1429233c17a41a319b6ae94:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^