Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> eedbbf4d8f8ed9bdb252765ddfb87b59801173cba9a32af9a4d6a44678626940:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^