Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> a7dd5e08a41d8d6baa5d913a29c59377c67d626ae48cabd2049588c2b063f9e2:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^