Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> b501e9adbbaad84ffe502a4c2f72dfb013095d4a985ef8a2cd391babf2c12c1b:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^