Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 332eeead243036ccf5198cf5e68c1814fff500c03e11ebf05e1be48f97cfb171:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^