11 Feb Ethereum: Why I’m getting the error [FAIL. Reason: EvmError: Revert]?
Fuzz test purification for Ethereum intelligent contracts
As a developer that works in a NFT market, it is likely not alien to the complexities of Ethereum’s intelligent contracts. However, when combined with Fuzz tests, the process can become increasingly challenging. In this article, we will deepen the two errors that are causing problems during their Fuzz test: Evmerror: Revert and will provide guidance on why they could be happening.
What do these error codes mean?
Before immersing ourselves in the solution, we understand what these error codes represent:
Evmerror: Revert: This is a type of Ethereum execution time error that occurs when a contract wants to reverse its internal status. In other words, it returns a “undo” command to the execution environment.
EVMError Code: These are specific error codes used by the Ethereum virtual machine (EVM). They are usually preceded by an error code prefix (0x).
Why does the Fuzz test contract interact with the block chain?
The two mistakes he mentioned, Evmerror: Revert, indicate that there is a problem with the interaction of his Fuzz test contract with the Ethereum Network. It seems that the contract is trying to reverse its internal status but find an error.
There are several reasons why this could be happening:
- Logic of the incorrect contract : Its NFT market contract could contain a code that attempts to manipulate the block chain so that it is not intended or that are not backed by the Ethereum ecosystem.
- Unattainable state
: The contract execution environment can enter a state in which its internal status cannot reverse due to conditions such as gas depletion, high network rates or other unforeseen circumstances.
- missing or incorrect implementation of the logic
reverse ': Make sure your contract correctly implements the function reverse’, which is a critical part of the execution time of Ethereum.
Solutions and best practices
To solve these problems:
- Review and optimize the logic of the contract : Verify the functionality of your contract twice to ensure that the block chain is correctly manipulating without causing unintentional side effects.
- Verify gas efficiency : Optimize gas intensive operations in your contract, especially those that involve complex calculations or manual state management.
- Implement the logic of reversing correctly : Make sure that your function is to be implemented and properly properly tried to avoid unexpected behavior.
In addition, consider the following best practices when Fuzz tests:
* Start with simple tests first : focus on basic functionality before immersing yourself in more complex scenarios.
* Test for specific edge cases : Identify possible error conditions and create test cases to cover them.
* Use tools such as Truffle or Test Utilities Incorporated from Hardhat : Take advantage of these tools to optimize your test process and reduce the probability of errors.
By understanding why Evmerror: Revert is happening during his Fuzz test and implementing corrective measures, he can improve the reliability and safety of his NFT market contract.
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