Ethereum: Operating functions in separate contracts
The Ethereum Blockchain platform is built on top of solidity, programming language used to create intelligent contracts. Intelligent contracts are suicide contracts with the terms of the agreement written directly into the rows of the code. To achieve this, developers use functions and interactions with contracts that allow them to overwrite or modify existing behavior.
In a typical Ethereum project, several contracts will develop to perform various tasks. For example, the application of decentralized financing (Defi) may consist of a credit protocol, a revenue farm and a stablein management system. In order to increase the efficiency and scalability of the application, developers create separate contracts that can interact with each other.
Problem: Virtual features
There is a common challenge for first -class features in Ethereum. The problem lies in the way virtual functions are defined. The virtual function is a special type of contract that defines a specific set of methods (functions) without implementing them. These functions may be suppressed by other contracts.
However, when several contracts define the same virtual function, this leads to irregularities and difficulties in maintaining the integrity of the project. This is where things are difficult.
Solution: Separate contracts
To solve this problem, developers create separate contracts that confirm the virtual function. There are two primary approaches:
- For example::
`Solidity
Foo {contract
FOO FUND () PUBLIC payable {
// implementation
}
}
A contractual bar {
using Foo {FOO as FOOFUNCTION};
Function Function () Public Returns (BOOL) {
return Foofunction ();
}
FOOFUNCTION function () Public Payable {
// implementation
}
}
`
In this example, the contract “BarThe contract rewrites" FOO ()The function of the contract“ FOO ”by calling“ FOOFUNCTION () .
- Use of a shared storage mechanism
: Another approach is the use of a shared storage mechanism such as Storage Worlds or Web3 Storage, to store data to which it is necessary to access multiple contracts. For example::
Solidity
Foo {contract
Bytes of public food;
Setfoodata features (byte memory _data) public pay {
Foodata = _data;
}
Getfoodata function () Public View Returns (Bytes Memory) {
Return the Foodata;
}
}
A contractual bar {
Fooinstance Storage;
The function has been suppressed
FOOINSTANCE.FOODATA = _DATA;
}
Getfoodata function () Public View Returns (Bytes Memory) {
return FOOINSTANCE.GETFODATA ();
}
}
`
In this example, the “bar” contract stores data in an instance of a “Foo” shared storage. The translisyfoodata () updated data is updated by suppressing the original function Foodata ().
Proven procedures
When implementing the rewritten functions in separate contracts, follow these proven procedures:
- Use consistent naming conventions for your contracts and functions.
- Clearly document the implementation details, including any self -logic or justification for each rewrite.
- Test thoroughly to make sure the rewrite is correct and work as expected.
- Consider the use of a shared storage mechanism such as Web3 Storage or Storage Worlds to store data to be accessed in multiple contracts.
Conclusion
Operating functions in Ethereum require careful planning and implementation. By understanding the challenges of virtual functions and implementing separate contracts, developers can create more efficient and scalable intelligent contracts.