Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b285e0a2e57c0c424a44568773b2d7d08f9005ed692684f7e7552e1f5bdd401e:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^