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What Is an ‘Upgradeable’ Smart Contract and Why Is It Controversial in the Context of Immutability?

An upgradeable contract allows logic changes via a proxy, which is controversial as it compromises immutability and reintroduces centralization risk.
Greeks.Live05.11.25

What Is an ‘Upgradeable’ Smart Contract and Why Is It Controversial in the Context of Immutability?

An upgradeable contract uses a proxy pattern, allowing the logic to be swapped out by deploying a new implementation contract, while keeping the contract's state and address the same. This is controversial because it compromises the core blockchain promise of immutability, as a single entity or DAO can change the contract's rules after deployment.

While it allows for bug fixes, it reintroduces a level of trust and centralization risk.

Can Gas Optimizations in the Logic Contract Offset the Proxy’s Overhead?
What Is a Proxy Pattern in the Context of Smart Contract Mutability?
What Is the Difference between a Transparent Proxy and a UUPS Proxy?
Does the Proxy Pattern Affect the Cost of Contract Deployment?

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