Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1c19ff85258372e56d0697dbee6f377c4b0addabd26d09bf9ee05c96640f6336:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^