Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 11dde84002c9a3b57d7afbe78bc7a906520abb6bda0b7aca888089c7fae2d500:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^