Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 214e64b49f3b1b668f697a311feda6de3b9f2f2bd98c44a6e5bb2b4755d1dd58:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^