Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 1aeb44e6aa68481ca3dc68037d64e5842b5cac16587cec2e861701990fb3446d:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^