Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> fc1448c05871e816d2c931357c32fbd86bc61b1af44f9a4f233e84cc65f11c0b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^