Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a45bb25aef1369ad19cfadb6406bae327778240d228491c5990940aed501dd11:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^