Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ec8d585671823b5d70a945f617354f1e2f1a0ac3fee2c95f2de0a556e3d59670:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^