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this video will explain how to update your smart contracts using the opens up in upgradable contracts [Music] started lets review how upgradable contract works here I have whats called a proxy contract this is a contract that the users will call and on the right we have a contract called implementation these are the contracts that can be upgraded a user sends a transaction to the proxy contract the proxy contract executes the fallback function and it dedicates call to the implementation contract this means that the code inside here will be executed using the state variables inside here later lets say that we deploy a version 2 of The implementation then we can upgrade the smart contract by routing all transactions from the user to version 2 instead of version 1. this is how a combination of proxy fallback and delegate call enables contract to be upgraded the proxy contract will have a function to upgrade the implementation from B1 to B2 and we probably should restrict the access to