Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> abf32a59fea75f4a8d1dc94e28923fa218860a389145ee14c3edc4442aa6b3ff:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^