Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> 0fb8869cb9e9f41d2cb85bf023e738784672ee1a9c79c5fce755416d5f1c1f06:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^