Transaction

[Error Code: 1101] cadence runtime error Execution failed:
error: underflow
  --> de1766612d28f7bd8211e5cde9dccbdd8917173cd46216e9bdc524b2be3386ba:16:8
   |
16 |         let total: UFix64 = SwapConfig.ScaledUInt256ToUFix64(res) - 0.2
   |         ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^