Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> af0658f981c0d9ba5fdf321ec57d67329b16e78576e0167057914c8a09a1cb97:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^