Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> e1b3f3df422f828cae3da899fa0c5ca5edf7e4c11dd9383290d4c092477fade8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^