@Override
  public Collection<Address> validatorsInBlock(final BlockHeader header) {
    final BftExtraData bftExtraData = bftExtraDataCodec.decode(header);
    return bftExtraData.getValidators();
  }
Instantiates a new Bft block interface.

@param bftExtraDataCodec the bft extra data codec
consensus/common/src/main/java/org/hyperledger/besu/consensus/common/bft/BftBlockInterface.java