Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a5e7ed07d8787c84414274533debdf59d1961a5c6429b8e555b1782c8600c180:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^