Ethereum EIP-712: Practical use of the verification contract
Introduction
The Ethereum virtual machine (EVM) has introduced several safety improvements via the Ethereum improvement proposal (EIP) -712, which provides a means of checking contractual signatures. In this article, we will immerse ourselves in the practical use of the “VeriveStracttract” domain in the structure “EIP712Domain” and explore its potential applications.
What is the verification contract?
In EIP-721 and EIP-1559, verification contracts have been introduced as a means of authenticating contractual signatures. The VeriveyContract ‘field is used to store information on the signature verification process for a given contract.
Practical use of the verification contract
The field VeriveyContract 'in the structure EIP712Domain’ has several practical uses:
- Verification of the signature : When you call the Check function, you can use the
Verifypontract 'field to store the verification result and perform additional checks before carrying out the contract.
- Pre-validation : You can use theVerifypontract ‘field to pre-value a specific code section in your contract. This ensures that only valid contracts are executed.
Call for verification of the function
Here is an example of how you can use the VeriveyContract 'field:
Solidity
Contract mycontract {
myfunction () public function {
// Pre-validation: Check the signing of the contract before execution
require (verifycontract ("my contract", "my function") == 1, "signature verification failed");
// Execute the contract code
Storage instance myContractStorage = MyContractStorage (Addressof (Instance));
Instance. Myfunction ();
}
}
'
In this example, we call the "Verifyctract" function and pass the address of the contract and the name of the function as arguments. The return value of the "Verifyctract" function is used to pre-validate the code before execution.
Use of VerifyContract
The "Verifyctract" function has several parameters that can be used to personalize your behavior:
Contractaddress': The address of the contract is verified.
- Functionname
: The name of the function called in the contract.
- Hash
: a hacking of the contract bytecode.
You can use these settings to pre-validate specific code blocks and perform additional checks before execution.
Example of use
Here is an example of how you can use the "Verifyctract" function:
Solidity
myfunction () public function {
// Pre-validation: Check the signing of the contract before execution
Require (VERIFYCTRACT (Addressof (MyContract), "Myfunction") == 1, "signature verification failed");
// Execute the contract code
Storage instance myContractStorage = MyContractStorage (Addressof (Instance));
Instance. Myfunction ();
}
'
In this example, we call the "Verifyctract" function with the address of our contract and the name of the function called in the contract.
Conclusion
The fieldVeriveyContract ‘in the structure” EIP712Domain “provides a robust means of verifying contractual signatures and pre-validating specific code blocks. By using this feature, you can ensure the safety and integrity of your contracts based on Ethereum. Although it is essential to follow best practices for secure coding, the use of “VeriveyContract” can be a precious addition to the design of your contract.
Recommendations
When implementing the VeriveyContract field” in your EIP-712 domain structure:
- Use it consistently : Make sure you use theVerifyctract ‘field throughout your contracts and functions.
- Store the verification results : store the verified result of the
Verifyctractfunction to perform additional checks before execution.
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