Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 67554882ccecae5fda0206232dbd544e68b7043c3a7f0bc9a1d7c3860ca9c17c:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^