public static Address getProposerOfBlock(final BlockHeader header) {
    final CliqueExtraData extraData = CliqueExtraData.decode(header);
    return extraData.getProposerAddress();
  }
Gets proposer of block.

@param header the header
@return the proposer of block address
consensus/clique/src/main/java/org/hyperledger/besu/consensus/clique/CliqueHelpers.java