Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ebb73f714153114a4f1ecc61da457f777f25b243c0dba71c7194d4ef2d8e0c45:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^