Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 4d46d9ddffa3b81f530fa6dd5bc507cbd01cb877c2697c68891b04fa63be60a4:16:32
   |
16 |                                 var total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |                                 ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^