Ethereum: call getReserves() function using yul in solidity

Ethereum: Using the function GetReserves () s yul in Fortress

The “GetReserves” function is a decisive part of the intelligent contractual architecture of Solan Blockchain, which provides access to reserve assets that are owned by a pair of tokens. In this article, we will immerse why “GetReserves2is problematic and provide a solution using the Yul compiler in the strength.

problem withGetReserves2

The "GetReserves" function is labeled as an external function, which means that it can only be called outside the range of the contract. The reason is that Solana's security features are designed to prevent malicious code from accessing sensitive functions such as "GetReserves (). The keyword "external" is used to indicate that the function should not be called until the contract itself.

However, when we call a "pair" contract using theCall ()with keywordstatic, we try to access“ GetReserves2 ”, which is an external feature. This will result in a compilation error:

Solidity

Pragma of solidity ^0.8,24;

Pair of contracts {

The GetReserves function () public …

// Error: GetReserves2 is an external function and cannot be called it directly from this contract.

}

`

Solution: Using a yul compiler

To solve the problem, we can use the yul compiler to call theGetReserves (). The yul compiler allows us to hand over the parameter to the function using the ‘$ arg.

Here is an updated version of the contract that uses "Yul to call” GetReserves2 “:

`Solidity

Pragma of solidity ^0.8,24;

Pair of contracts {

UInt64 [] public reserves;

Public pair address;

GetReserves feature (address _paraddress) Public Pure Returns (UInt64 []) {

// Get reserve assets for a given pair

reserves = GetReserves2 (_paraddress);

}

Function of GetReserves2 (address _paraddress) internal returns (UInt64 []) {

// implement logic to call a yul compiler and load reserve assets

// for example:

UInt64 [] Memory Reserves = 0;

// …

Repayable reserves;

}

}

`

In this updated version, we added a new feature “GetReserves2, which calls the Yul ​​compiler to perform its logic. We transmit the `_paraddress parameter as an argument feature “GetReserves ().

By using theyulcompiler and handing over parameters in a way that is compatible with the Solana safety features, we can call the function" Getreserves2 from the outside of our contract without any problems.

Conclusion

The “GetReserves” function is designed to be safe and private under the contract itself. However, when you call external features like “GetReserves2, we need to use the Yul compiler to safely perform our logic. Using theyulcompiler in the strength, we can call the function“ GetReserves2 while ensuring our safety and preventing potential vulnerabilities.

By following this manual, you should now be able to successfully call “GetReserves2` from the outside of the contract without any problems.

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