Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> cd36b34e5c8e0176f03f7df32f4e4f21fe467e93508894ac0a92745880987a04:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^