Ethereum: How do people audit smart contract if only the bytecode is stored?

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Understanding the audit of the smart contract: how to check the integrity of the code if only byte code is saved

As a newcomer to interact with smart contracts, you are likely to face the challenge of verifying the integrity of the located code without entering the collected bytecode. In this article, we will go into the audit of the smart contract and explore the methods used to test the consistency of the code when only bytecode is preserved.

What is a smart contract audit?

The audit of the smart contract includes the evaluation of the functionality and behavior of the contract, examining its inner state, the history of execution and all the relevant logs. This process helps ensure that the logic of the contract is correct, safe and adhere to best practices.

Why can’t we just make a bytecode?

Even if only bytecode is saved, it is still possible to test the integrity of the code using a variety of methods:

1
Static analysis : Compilers can perform a forecode static analysis by identifying possible problems such as syntax errors, semantic errors or vulnerabilities.

• Dynamic Analysis : While only bytecode is available, you can still analyze execution logs and call the traces of the pile to determine the problems that may arise during the time of executive time.

3
Code Overview

: The person who audits the smart contract reviews the solidity code (programming language used for Ethereum contracts) to ensure that it respects best practices, guidelines and security standards.

As auditors check code integrity

Auditors use a combination of these techniques to test the correctness of the smart contract code:

1
Static analysis tools : Tools such as Triffle Suite or Etherscan Audit Tool can analyze Bytecode to identify possible problems.

2
Source Cards

: Some contracts include source cards whose card collected bytecode back to the original source file. This helps auditors to understand the stream of execution and determine the source code errors.

3
Call Back Analysis : The auditors check the traces of the call pile to identify possible vulnerabilities or the abuse of contract functions.

• Comparison with known good contracts : Comparing the behavior of the smart contract with similar, well -documented contracts, auditors can identify non -compliance or questions.

Example of use: Solidity Code Review

Here is an example of how the audit includes a revision of the solidity code:

Let’s say you are on the recent Ethereum contract and you only have access to the collected bytecode. You make a code using the truffle command:

`

truffle

`

The resulting `bin ‘file is compiled bytecode for your smart contract.

You then review the stability code in the text editor or IDE to ensure that it respects best practices and security standards. You also check the call pile feet and follow the logs to discover possible problems.

Conclusion

Although only bytecode is maintained, audit is still an important step in ensuring the integrity of smart contracts. By combining static analysis, source mapping, call pile analysis, and compared to known good contracts, auditors can check the code consistency even without access to the collected bytecode. As you continue to learn about the interaction with smart contracts, keep these techniques in mind to ensure the safety and reliability of your projects.