docs: async def block(client: Client, number: int = 0, block_raw: str = None, signature: str = None) -> Union[dict,
                                                                                                          ClientResponse]:
      """
      GET/POST a block from/to the blockchain
  
      :param client: Client to connect to the api
      :param number: Block number to get
      :param block_raw: Block document to post
      :param signature: Signature of the block document issuer
      :return:
      """
      # POST block
      if block_raw is not None and signature is not None:
          return await client.post(MODULE + '/block', {'block': block_raw, 'signature': signature},
                                   rtype=RESPONSE_AIOHTTP)
      # GET block
      return await client.get(MODULE + '/block/%d' % number, schema=BLOCK_SCHEMA)