## transactionPayment
 
 operationalFeeMultiplier: `u8`
- **interface**: `api.consts.transactionPayment.operationalFeeMultiplier`
- **summary**:    A fee multiplier for `Operational` extrinsics to compute "virtual tip" to boost their  `priority` 

   This value is multiplied by the `final_fee` to obtain a "virtual tip" that is later  added to a tip component in regular `priority` calculations.  It means that a `Normal` transaction can front-run a similarly-sized `Operational`  extrinsic (with no tip), by including a tip value greater than the virtual tip. 

   ```rust,ignore  // For `Normal`  let priority = priority_calc(tip); 

   // For `Operational`  let virtual_tip = (inclusion_fee + tip) * OperationalFeeMultiplier;  let priority = priority_calc(tip + virtual_tip);  ``` 

   Note that since we use `final_fee` the multiplier applies also to the regular `tip`  sent with the transaction. So, not only does the transaction get a priority bump based  on the `inclusion_fee`, but we also amplify the impact of tips applied to `Operational`  transactions.