Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ef61c06ad71826b3b5e5f6518ac571db206d0ebb16e37f143a95a9098a76a4b8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^