Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 5357feb48aadc6a5c4c4ef1ccbda3645385e944aff77dc4db65f9cff05e78651:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^