Definition

What is Upgradeable contract (proxy)?

An upgradeable contract uses a proxy that delegates calls to a separate implementation contract, so the logic can be replaced while the address and storage stay the same.

Proxies add power and risk in equal measure: storage layout must be preserved across versions and upgrade authority must be tightly controlled. Monad's 128 KB code limit reduces one common reason for splitting logic across proxies.

Definition by Adwait Keshari, founder of Monsmith.