Change parallel and sequential contracts
Change parallel and sequential contracts

Closes: https://github.com/metarhia/MetaSync/issues/118

Reviewed-By: Timur Shemsedinov <6dc7cb6a9fcface2186172df883b5c9ab417ae33@gmail.com>

metarhia/MetaSync,DzyubSpirit/MetaSync,DzyubSpirit/MetaSync