Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b9e7efce174c8d730131c84455d5e33ee35edff9966f18189537404c13d68fb8:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^