Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> ca1534930cf39266cf4fda348c5fb020184be06ed3464f4e4256f9004904a9ad:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^