IbftQueryService (plugin-api 1.4.0-RC1 API)

All Superinterfaces:

PoaQueryService
```
public interface IbftQueryService
extends PoaQueryService
```
Allows for the IBFT 2.0 specific aspects of the block chain to be queried.

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method	Description
`int`	`getRoundNumberFrom(BlockHeader header)`	Extracts the round number from the supplied header and returns it to the caller.
`java.util.Collection<Address>`	`getSignersFrom(BlockHeader header)`	Extracts the collection of signers from the supplied block header and returns them to the caller.

Methods inherited from interface org.hyperledger.besu.plugin.services.query.PoaQueryService
getLocalSignerAddress, getProposerOfBlock, getValidatorsForLatestBlock

- Method Detail
  - getRoundNumberFrom
```
int getRoundNumberFrom(BlockHeader header)
```
    Extracts the round number from the supplied header and returns it to the caller.
    
    Parameters:
    
    header - the block header from which the round number is to be extracted
    
    Returns:
    
    The number of failed rounds executed prior to adding the block to the chain.
  - getSignersFrom
```
java.util.Collection<Address> getSignersFrom(BlockHeader header)
```
    Extracts the collection of signers from the supplied block header and returns them to the caller.
    
    Parameters:
    
    header - the block header from which a list of signers is to be extracted
    
    Returns:
    
    The addresses of