Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1babce7249e21d808a9a3d06329cde95b372c46a8d27f5fbe6aed6c4693bf476:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^