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4 Most Useful Smart Contract Debugging Tools

March 5, 2023
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This information might help you discover that nasty bug troubling you and the instruments to rectify them.

Debugging is essential to any software program improvement cycle; people at all times make errors. That’s why we’re unbeatable; we make errors and be taught from them. Debugging is a means of determining the place our code is lagging, fixing that, and studying about that error in order that it’s not repeated.

Good contract improvement is essential to constructing blockchain functions. However as with all different software program improvement cycle debugging good contracts can generally be difficult, and as right here we regularly cope with an enormous sum of money, we can’t depart something to probability. Now we have to be excellent at writing good contracts and ideal at debugging. That’s why we’ve give you this weblog with the intention to study debugging from the very best. 

Earlier than fixing something, we have to know the problem, so let’s start with figuring out various kinds of bugs in good contract improvement.

Widespread Errors

On this part, we are going to discover various kinds of bugs good contract builders come throughout often.

Syntax error:– This error is a straightforward one to repair. This occurs when a developer makes a code mistake that stops the pc from understanding it, like lacking a semicolon.

Logical Error:- The sort of error can generally be arduous to seek out. It doesn’t forestall the execution, however the programme’s performance is altered. This programme behaves unexpectedly like a sensible contract that transfers cash to the inaccurate deal with when sending cash from one account to a different.

Runtime error:- These errors are arduous to foretell. They arrive at an surprising time and surprising locations. This happens throughout the execution of good contracts and occurs because of inefficient exception dealing with. For instance, this may increasingly happen when a contract fails to deal with surprising inputs or makes an attempt to hold out an operation prohibited by the underlying blockchain. For instance, a contract is making an attempt to switch extra money than the allowed parameter.

Execution Reverted Errors:- This occurs when the person makes any illegitimate request that’s in opposition to the good contract’s logic then the request is canceled and reverted. This occurs as a result of generally good contracts require sure necessities to be met to course of the transaction. Nonetheless, the person proceeds with the transaction with out fulfilling the necessities, after which the transaction shouldn’t be carried ahead and reverted. For instance, a person is making an attempt to switch $100 however has a $50 steadiness.

Stack Overflow:- The assets for executing the operations value a gasoline price. The heavy the operate, the extra the associated fee. A number of the heavy mechanisms in coding are loops and recursive calls. Stack overflow has to do with recursive calls. Recursive calls are a method of invoking a function within the same function with different inputs You can think of a recurring function as the sugarcane juice machine. The machine behaves as a function and the sugarcane as input. Each run of sugarcane from the machine means a function call. After one time, the sugarcane goes under the machine again, and this process keeps repeating. This is what recurrence is. But as we want to cut on gas costs and EVM resources, ethereum limits the recurrence call up to 1024 times. When you call a function 1025th time, it results in a stack overflow.

JUMP error:- When you try to call a function that does not exist or use assembly language and point to false memory, this results in an error. This can even happen when you call a function of some other contract, but that function does not exist. These types of errors are called JUMP errors.

These were some common smart contract errors developers encounter; errors can sometimes be hard to detect and understand. To find the errors and try to fix them, we take the help of various tools. Let us go through them one by one in the next section.

Four Useful Debugging Tools

In this section, we will learn about tools heavily used to identify and resolve bugs by most experienced developers worldwide. Let’s go.

Hardhat

This tool is widely used and accepted for testing smart contracts on various parameters. It provides an open-source development environment for Ethereum. It includes tools for developing, testing, and deploying smart contracts. Its built-in debugger is helpful to many developers around the world. This plays a heavy role in the testing phase too.

Truffle

This is a popular development framework for Ethereum. Like hardhat, it includes tools for developing, testing and deploying smart contracts and also has built Truffle Debugger, which helps developers with a smooth development experience in the testing stage.

Remix

This is the one which almost every developer came across when they first started their journey in web3. This is an online code editor for solidity, so no offline installation is needed to begin with development. Its built-in debugging feature lets developers scan the code and inspect variable issues. And all of this is online no need for offline tools.

Etherscan

This is a widely trusted and popular block explorer for Ethereum. It allows developers to inspect and debug smart contracts deployed on the Ethereum blockchain. Using this, you can track transactions and activity of any address or contract. This helps you identify where the issue would be if your smart contract is facing any on-chain issues.

Conclusion

Debugging smart contracts is difficult and sometimes frustrating, but it is a crucial stage related to security and testing. This is where vulnerabilities are most likely to present themselves to hackers and can lead the protocol to complete failure. To save yourself from such circumstances, it is highly advised to go for audits.

QuillAudits has been in this vertical for a long time and has an expert team that can handle every possible vulnerability and help you secure your protocol. Regarding the testing, its importance, and its relation with debugging, read the detailed blog, which will help you understand every aspect https://blog.quillhash.com/2023/02/16/testing-and-formal-verification/. Do visit our website and get your project audited!

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