The proxy contract does not contain any business logic. To upgrade business logic you would create a new smart contract that the proxy interacts with. Users will interact with the same proxy contract and all data remains stored in state. In the event of an upgrade the proxy contract is still used. A delegate call will allow you to execute a function in the context of another contract. To have the proxy contract interact with the actual contract we will use a delegate call. The proxy contract will then interact with the actual contract to execute all calls. Upgrade Method 1 – Proxy contract using a delegate callįor this first upgrade method users will interact with a proxy contract that does not contain any business logic.

These methods will work on Ethereum, Binance Smart Chain, Polygon, or any other EVM compatible blockchain. In this tutorial we will review several methods that will allow you to upgrade a Solidity smart contract.

If you deploy a new version of the contract you also start with an empty storage. As you are aware smart contracts are immutable and once they are deployed to the blockchain they cannot be changed. You might want to fix a software vulnerability, change the logic of the contract or add a new feature. There are situations when you want to upgrade a Solidity smart contract.

How to upgrade snagit 12