public async Task registry_contract_returns_not_found_when_key_doesnt_exist()
{
using TestTxPermissionsBlockchain chain = await TestContractBlockchain.ForTest <TestTxPermissionsBlockchain, TxCertifierFilterTests>();
chain.RegisterContract.TryGetAddress(chain.BlockTree.Head.Header, "not existing key", out Address _).Should().BeFalse();
}
