Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ad5aabc768e0f707f1a071a78923b7e9eb829a1671c195ed27bf9aaac761a6a2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^