Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 86d538f501af789a53a8953bc7fba9dfd996626f4daa30e739222abcc1d73a45:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^