text: from tests.helpers import random_encoded_account_number
  
  from thenewboston.accounts.manage import create_account
  from thenewboston.blocks.block import generate_block
  from thenewboston.constants.network import BANK, PRIMARY_VALIDATOR
  from thenewboston.serializers.network_block import NetworkBlockSerializer
  from thenewboston.verify_keys.verify_key import encode_verify_key
  
  
  def test_network_block_serializer():
      signing_key, account_number = create_account()
      encoded_account_number = encode_verify_key(verify_key=account_number)
  
      transactions = [
          {
              'amount': 1,
              'fee': BANK,
              'recipient': random_encoded_account_number(),
          },
          {
              'amount': 1,
              'fee': PRIMARY_VALIDATOR,
              'recipient': random_encoded_account_number(),
          },
          {
              'amount': 5,
              'memo': 'Hello there I am 123 years old',
              'recipient': random_encoded_account_number(),
          }
      ]
  
      block = generate_block(
          account_number=account_number,
          balance_lock=encoded_account_number,
          signing_key=signing_key,
          transactions=transactions
      )
  
      serializer = NetworkBlockSerializer(data=block)
      assert serializer.is_valid()
  