Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 05c3c3688d8abb4d2502d37b6a6efebccdda7359c3230dda20fda203d3c4328b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^