public StatusMessage build() {
      final EthStatus status =
          new EthStatus(
              protocolVersion,
              networkId,
              totalDifficulty,
              bestHash,
              genesisHash,
              forkId,
              blockRange);
      return create(status);
    }
Return The block range of the associated node's local blockchain. (Eth/69)

@return The block range of the associated node's local blockchain.
ethereum/eth/src/main/java/org/hyperledger/besu/ethereum/eth/messages/StatusMessage.java