Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 49b591be515f6cdb57895eebcaf5607a96c06e8824b6ca4243b1b9ede4a6f3c2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^