What Happens to a Contract’s State Variables during a Mutable Upgrade?
During a mutable upgrade using a proxy pattern, the contract's state variables (data) are preserved in the proxy contract's storage. The new logic contract only dictates how that existing data is read and modified.
It is crucial that the storage layout of the new logic contract is identical to or compatible with the old one to prevent data corruption, a risk known as storage collision.
Glossar
State Variable
Data ⎊ A state variable represents data permanently stored on the blockchain within a smart contract's storage.
Contract Upgrade
Modification ⎊ A contract upgrade refers to the technical procedure of altering the logic or parameters of a deployed smart contract, which is essential for the iterative development of crypto derivative platforms.
Upgrade
Iteration ⎊ An upgrade, within cryptocurrency, options trading, and financial derivatives, signifies a protocol or system evolution, often implemented through hard forks or soft forks in blockchain technology, impacting consensus mechanisms and smart contract functionality.
Logic Contract
Framework ⎊ A Logic Contract, within the context of cryptocurrency derivatives and financial engineering, represents a formalized agreement encoding conditional execution logic directly onto a blockchain or distributed ledger.
State Variables
Mechanism ⎊ State variables, within cryptocurrency and financial derivatives, represent the core inputs defining a system’s present condition, crucial for modeling price dynamics and risk assessment.