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Best Practices to Protect Your Smart Contracts

Blockchain technology continues to be promising in light of the security landscape’s ever-changing scenarios, and it has generated a lot of hype over the years. The heart of any blockchain is the smart contract. A smart contract is a piece of software that runs automatically when specific criteria are satisfied. These self-executing smart contracts can enforce an agreement’s terms without the involvement of a third party. More and more sectors are embracing this protocol as smart contracts gain popularity. It is crucial to develop with a security perspective because failure can be costly, and change can be challenging. Therefore, more than a simple defense method against known vulnerabilities is required. Utilizing secure design patterns such as rate limiters and evacuation strategies are advised.

What are Smart Contracts?

Computer programs known as “smart contracts” automatically carry out transactions when such criteria are met. A contract is enforced between the parties engaged in a transaction using smart contracts running on the blockchain. They are frequently used to perform large-scale transactions. As a result, they must be built safely and securely to prevent tampering.

A smart contract can securely transfer payments or data between parties to an agreement without requiring confidence because the conditions of the agreement are put directly into the code. Another unnecessary thing is the involvement of regulators and middlemen in the process. Once a set of predetermined circumstances is met, a smart contract’s lines of code automatically enforce the terms of a contract between two or more parties. Security, transparency, speed, and efficiency can all be found in smart contracts because they are built on top of blockchain technology.

A smart contract is computer software that automatically executes transactions when predefined conditions are satisfied. They use blockchain technology to ensure that the parties engaged in the transaction adhere to the terms of their agreement. They are frequently employed when dealing with enormous sums of money. That’s why it is critical to develop them securely and ensure they can’t be tampered with.

A smart contract can securely transfer payments or data between parties to an agreement without requiring confidence because the conditions of the agreement are put directly into the code. Regulators and middlemen are also superfluous in this process. An agreement between two or more parties is automatically executed when preset circumstances are met via lines of code in a smart contract. Smart contracts are based on blockchain technology and inherit the blockchain’s major advantages, such as security, transparency, speed, and efficiency, from the blockchain itself.

 How to Secure Your Smart Contract?

When programming your smart contract, make sure you follow the best practices.

Before putting your code into production:

  1. Ensure it has been thoroughly tested.
  2. Conduct tests of static and dynamic code, as well as penetration tests.
  3. Make use of automated tools and debuggers and scanners.


What are the best practices for securing smart contracts with different blockchain platforms?

Most blockchain networks have various security flaws that criminals might take advantage of. However, given the current state of smart contract research, these problems are still solvable. Implementing best practices with no chance of creating vulnerabilities or unexpected events is the best method to deal with these problems.

When making safe smart contracts for different platforms and coding languages, it’s essential to follow the best practices. The mindset of smart contract creators significantly impacts the general practices of smart contracts. Additionally, the techniques used to create the smart contract are very important in developing the standard best practices for smart contracts built on the Ethereum platform.

Although smart contracts are very particular programs, developers’ primary purpose is to ensure the accuracy and security of their code. Here are some best practices for developing smart contracts.

Be cautious of unnecessary features.

One of the reasons Ethereum and EOS are so popular is their wide range of smart contract functionality. Many blockchain experts, though, say that this functionality usually comes at the cost of security. There are several best practices for working with smart contracts that enable complicated, multifunctional protocols. If you don’t, you risk introducing fatal flaws in your code.

Zilliqa and Cardano, for example, help developers increase the security of their code with the addition of smart contract limitations. While these limitations may limit the contract’s functionality, their extra protection makes up for it. In addition, to ensure the safety of your smart contracts when dealing with these networks, you can use automatic validation tools on them.


Developing a crowd sale smart contract offers numerous choices for handling and collecting funds.

Agreement: Crowdfunds are held in a contract. After the crowd sale, the developer receives the funds.

Forwarding: Transferring funds to a multi-sig wallet instead of a contract. So, funds are held in a multi-sig contract with a time lock until the crowd sale ends.

Making Appropriate Use of Modifiers

The overview of best practices for implementing smart contracts in Solidity strongly emphasizes the prudent usage of modifiers. When a function is executed, the code included in the modifier will, in most cases, be given priority over the function body. However, modifiers can potentially disrupt the interaction pattern of the smart contract if the state changes or an external call is made. So, developers must only use modifiers to replace condition checks done twice in different methods.

Choose your programming language carefully.

If you have the option, use a smart contract programming language with security in mind. Complex, high-functioning contracts can be built using languages like C++ and JavaScript. However, your smart contracts are at risk here because of a severe flaw in the code.

To limit the number of faults and errors in code, many blockchains have developed their own programming languages. However, even seasoned programmers might need to correct their mistakes when dealing with well-known programming languages. This is because there are too many variables to consider, including issues with the language, the compiler, and the blockchain.

As an alternative to more complex programming languages, there are simpler ones, such as the Zilliqa smart contract-writing Scilla language. In contract writing, a developer’s ability to avoid common programming errors is greatly enhanced by the simplicity of languages like Scilla.

Regardless of the language you use, it’s essential to follow the best practices recommended by the language’s creators and the blockchain developers.

Interface and abstract contract trade-offs

The interfaces and abstract contracts effectively provide an adaptable and reusable method for smart contracts. Abstract contracts are like interfaces, but they don’t have the same features, can’t access storage, and can’t be built on top of other interfaces. Before implementation, they contribute to contract design. For all the other functions to work, a contract based on the abstract contract must override it.

Final Thoughts

The final comment on smart contract best practices says that security is among the top priorities. Smart contracts enable the autonomous implementation of agreements based on predetermined criteria and at a predetermined time. On the other hand, the ever-changing technological trends and needs of smart contracts have made it necessary to come up with new standards for making smart contracts.

Smart contracts must be developed securely if anyone intends to use this technology. Following the best practices and hints, you can write secure and dependable code. In addition to this, it is important to test your code thoroughly before putting it into use.

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