Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1f7d2f7c7d1e282083e6e9bddd3195b407e3f24931441947d766fb7f600830ef:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^