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Improvement of smart contracts with new fields: How to safely modify storage layout
As a developer working on Ethereum -based smart contracts, you are probably familiar with your code -based upgrade concept to include new features. In this article, we will explore how to safely improve the existing smart contract using the upgraded smart contract models and introduce a new structure called the Governorcounthoundsimplestorage.
Background
Recently, developers have experimented with upgraded smart contracts that use special properties, such as “modernized ()” and “removable ()” so that the code can have greater flexibility. These innovations can improve the scalability, performance and security of your contract. One common approach is to create new structures that modify the existing storage layout.
GovernorCountingsimPlestorage upgrade
Let’s say you have a structure called GovernorcountingsimPlestorage with existing fields:
`SOLIDITY
// GovernatorCountingsimPlestorage.sol
Struct Governorcounthsimplestorage {
uint256 _Governors: uint256;
}
`
To improve this contract, we need to create a new structure that changes the layout of the storage. We can achieve this by adding new fields that have not yet been defined in the original structure.
`SOLIDITY
// GovernationalCountingsimPlestorageUpgrade.sol
Pragma Solidity ^0.8.0;
Struct Governorcounthsimplestorage {
uint256 _Governors;
UINT256 [] Managers; // New Field: GovernorcounthoundsimPlestorage
}
CONSTRUCTOR () Public {
_ Managers = 10; // Initial value for the Governor’s Minister
}
`
In this updated version, we have added a new field “GovernorCountingsimplest this new field is not part of the original structure and has a different name.
Safe modifying storage layout
To safely modify the storage layout, you must always follow these guidelines:
- Avoid the structure of the country mutation : Instead, use the new structure to create a temporary array and then update it.
- Use the
upgrade () Function: In order for the upgrade to operate, you must call the" newly stable () in the original structure before modifying its fields.
Let's show it with an example:
SOLIDITY
// GovernationalCountingsimPlestorageUpgrade.sol
Pragma Solidity ^0.8.0;
Struct Governorcounthsimplestorage {
uint256 _Governors;
}
The Governor of Governor of the Agreement is the UpgradableBlecontract {
Function GetGovernor () Public View Return (UINT256) {
return _Governori;
}
}
Features Modernization () Inner Pure Virtual not to pay {
// Call the upgrade to reset the Governor’s number
UINT256 [] memory managers = new uint256 [] (10);
_ Managers = 0; // Reset the Governor’s number
// Create a temporary array and update it
Governorcounthsimplestorage storage temp = Governoreisthsimplestorage (_Governori, Governors);
// Update the saved value
temp._governors += 1;
// Call again upgrade to save changes
}
`
Conclusion
Improving the smart contract through new structures is a powerful way to improve its performance and safety. By changing the memory layout, you can create more flexible contracts that can adapt to changing requirements.
When upgrading, be sure to follow these guidelines:
- Avoid mutation of the structure field directly.
- Use the “Jaunate ()” to make your upgrade work.
- Call
Modernyable ()Before and after the original structure of the field modification.
By fulfilling this best practice, you will be able to safely improve your smart contract through modernizing structures by reproducing new opportunities for scalability, performance and safety in your applications in Ethereum.
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