Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4abd1bf8979345aefca7781b3ec579fc56d4fb31ef0e9ee98292427e111c9907:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^