Upgradable Smart Contracts: Crafting Evolvable Designs without Security Compromises
August 16, 2023
Unvest blog

The blockchain realm offers permanence, which, while being its strength, can be a double-edged sword. How can you make sure your smart contract can evolve with changing needs without compromising its decentralization or security? Enter the world of upgradable smart contracts.

1. What are Upgradable Smart Contracts?

Unlike traditional smart contracts that are immutable once deployed, upgradable smart contracts allow for modifications in their logic post-deployment. This evolution is possible through a proxy mechanism.

2. The Need for Upgradability:

3. The Proxy Mechanism:

The concept rests on separating the logic of the contract (implementation) from its storage (state). Two main entities play a role:

a. Proxy Contract: This stores the address of the logic contract and delegates calls to it.

b. Logic Contract: Contains the business logic which can be replaced or updated.

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4. Upgrading Without Compromising Decentralization:

5. Safety Measures in Upgradable Contracts with Unvest:

a. Use Reputable Libraries: Libraries like OpenZeppelin offer standardized tools for upgradable contracts.

b. Regular Audits: Ensure the contract undergoes rigorous checks, especially post-upgrade.

c. Access Control: Limit who can upgrade the contract—typically, only the project's founders or a designated multi-signature wallet.

6. The Path Forward:

While upgradable smart contracts offer adaptability, they should be approached with caution. It's crucial to balance the need for change with the foundational principles of blockchain—transparency, decentralization, and security.

With platforms like Unvest, project founders can harness the power of upgradability while ensuring these principles are not compromised.