Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 96ada8e7b4d42e635e8b44c8590c8c731c10ed6605572b9f44042a805322ba64:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^