Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> dcc5bbce3bb19652c4a9ad698914655819b731185d8778a863e089f9c741b42c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^