Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eac3a3d25c213e9695f351216ba71c6790ceec93b1a20d5f72592d1c5b1b2bb5:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^