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Ethereum: Use the function “Calvary ()with yul in solidity
The function "CRESSVERS ()" "is a decisive part of the Solana Blockchain Smart Contract architecture and offers access to the reserves held by a token. In this article we will deal with the question of why the function" Preserves2 "is problematic And provide a solution using the YUL compiler in solidity.
The problem withPreserves2
The function of CREENSVES ()is marked as an external function, which means that it can only be accessed from outside the contract area. This is because the Solana security functions are designed in such a way that malicious code access sensitive functions such as “Derreserves (). The "external" key word is used to indicate that a function should not be accessed within the contract itself.
However, if we call up the "couple" contract with the "Call ()" function "with the keyword" Static ", we try to access the" Department "function, which is an external function. This leads to a compilation error:
Solidity
Pragma Solidity ^0.8.24;
Contract Paar {
Perfreserves () public …
// Error: Preserves2 is an external function and cannot be accessed directly from this contract.
}
`
The solution: Use the YUL compiler
To fix the problem, we can use the “YUL” compiler to call up the “Perfreserves ()” function. With the “YUL” compiler we can hand over a parameter to the function with the keyword “$ ark”.
Here is an updated version of the contract, in which “YUL” uses the “Preserves2" function:
Solidity
Pragma Solidity ^0.8.24;
Contract Paar {
Uint64 [] public reserves;
Address public pairad dress;
Perfreserves function (address _pairaddress) Public pure returns (uint64 []) {
// Get the reserve assets for the given couple
Reserves = DRESServes2 (_pairaddress);
}
Perfreserves2 function (address _pairaddress) Internal returns (Uint64 []) {
// Implement the logic to call up the YUL compiler and access the reserve wealth values
// For example:
Uint64 [] storage reserves = 0;
// …
Returns;
}
}
`
In this updated version we have added a new function “Preserves2” that calls the compiler “Yul" to carry out its logic. We hand over the "_pairaddress" parameter as an argument to the function "Cro -reserves ()" ".
By using the "YUL" compiler and the handover of parameters in a way that is compatible with the safety functions of Solana, we can call up the "Geterves2" function from outside of our contract without any problems.
Diploma
The function of prices ()is safe and private in the contract. However, if we call up external functions such as “Preserves2”, we have to use the YUL compiler to safely carry out its logic. By using the “YUL” compiler in solidity, we can call up the “Preserves2” function, at the same time ensure our security and prevent potential weaknesses.
If you follow this guide, you should now be able to successfully record the “Treerves2” function from outside your contract without any problems.
