Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 8822e8d94b777951e838a00ab1bf3333dc26646f72600e3606b20220279d8b63:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^