Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a9f2f91fa65d051ef8813d936e66d9646b227e4016440309df651be8b4c7f5c6:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^