Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 3bf65afaeddddb8e50d95cc01b0895c2488d41b24bf05124749ae405b99c9be2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^