public async Task can_sign_a_message_with_vault_key()
{
Address acc = await _wallet.CreateAccount();
Keccak message = new Keccak("0x4d46fa23b8c33e29753e4738abd05148ffc8b346b34780b92435ad392325c45f");
Signature result = await _wallet.Sign(acc, message);
result.Should().NotBeNull();
}
