Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 84ea1c30d74663a74b8e4d18c83e951a1adef4b656556542f1c72d34321eb9d8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^