code: function blockHeaderFromRpc (blockParams) {
    const blockHeader = new BlockHeader({
      parentHash: blockParams.parentHash,
      uncleHash: blockParams.sha3Uncles,
      coinbase: blockParams.miner,
      stateRoot: blockParams.stateRoot,
      transactionsTrie: blockParams.transactionsRoot,
      receiptTrie: blockParams.receiptRoot || blockParams.receiptsRoot || ethUtil.SHA3_NULL,
      bloom: blockParams.logsBloom,
      difficulty: blockParams.difficulty,
      number: blockParams.number,
      gasLimit: blockParams.gasLimit,
      gasUsed: blockParams.gasUsed,
      timestamp: blockParams.timestamp,
      extraData: blockParams.extraData,
      mixHash: blockParams.mixHash,
      nonce: blockParams.nonce
    })
  
    // override hash incase something was missing
    blockHeader.hash = function () {
      return ethUtil.toBuffer(blockParams.hash)
    }
  
    return blockHeader
  }
docs: Creates a new block header object from Ethereum JSON RPC.
  @param {Object} blockParams - Ethereum JSON RPC of block (eth_getBlockByNumber)