Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 87b0f92975829e9e6d65687e76cfff98ef07fd67ab3d69ebf5584e8c2818e460:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^