Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 99a5224470b705f366f73dc2a6e8e7e9c2f26ced30f89060b46ac73d5f1f2685:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^