Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 76847afccc0b4a001dc9e8fb78f9672f7ec804963921ab297dd5e0a12eb0b2f2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^