Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 117449323f91bdd95c42b993d21959604e88fc347ac6c804934f584856e21d29:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^