{"id":49038,"date":"2024-01-19T04:00:31","date_gmt":"2024-01-19T08:00:31","guid":{"rendered":"https:\/\/101blockchains.com\/?p=49038"},"modified":"2025-03-17T01:06:33","modified_gmt":"2025-03-17T05:06:33","slug":"solidity-inheritance","status":"publish","type":"post","link":"https:\/\/101blockchains.com\/solidity-inheritance\/","title":{"rendered":"What is Inheritance in Solidity?"},"content":{"rendered":"

Solidity<\/a> is a popular programming language for creating smart contracts<\/a>. It is one of the most used programming languages for developing smart contracts on Ethereum<\/a> and EVM<\/a>-compatible blockchains<\/a>. One of the important highlights of Solidity is the fact that it features the traits of object-oriented programming languages. Therefore, Solidity inheritance is definitely one of the features that you would find during the implementation of Solidity of smart contract development<\/a>.<\/p>\n

Inheritance refers to the ability of an object to inherit certain functions, behaviors, and variables from other objects. The applications of inheritance in smart contract development with Solidity help in creating smart contracts based on another contract<\/a>. It could help in extending the attributes and traits of a specific contract to derived contracts. Let us learn more about inheritance and its role in Solidity with examples.<\/span><\/p>\n

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What is Inheritance?<\/b><\/h2>\n

Solidity programming involves development of smart contracts with programming. One of the unique highlights of Solidity is the fact that it supports inheritance. You can find answers to \u201cDoes Solidity have inheritance?\u201d in the flexibility for expanding usefulness of smart contracts in Solidity. It is also important to remember that Solidity supports single-rules inheritance alongside multiple inheritance by employing polymorphism. Solidity enables smart contract inheritance with the flexibility for incorporating traits of multiple contracts in one contract.<\/p>\n

You can find different types of inheritance in Solidity, such as single, multiple, hierarchical, and multi-level inheritance. Single inheritance points to the situations in which one smart contract inherits the properties of another contract. Multiple inheritance is visible in scenarios where a single contract inherits the traits of multiple contracts simultaneously. Hierarchical inheritance refers to the cases where parent contracts could have more than one child contract. Multi-level inheritance is a variant of single inheritance, albeit with different levels of relationship between the child and parent contracts.<\/p>\n

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Importance of Inheritance in Solidity\u00a0<\/b><\/h3>\n

The discussions about inheritance traits of Solidity also draw references to its significance. Whether it is Solidity multiple inheritance or single inheritance, you can find different benefits. First of all, you must note that inheritance is one of the key traits of object-oriented programming languages.<\/p>\n

Developers can rely on inheritance to improve the functionality of a program by isolating code, eliminating dependencies, and increasing reusability of existing code. Interestingly, Solidity offers support for inheritance between smart contracts alongside inheritance of multiple contracts into one contract.\u00a0<\/span><\/p>\n

Developers could expand the attributes and properties of a parent contract to the derived contracts. In addition, Solidity inheritance example also showcases the facility for modifying the attributed and traits of derived contracts through overriding. Derived contracts could access all the non-private members, such as state variables and internal methods. At the same time, it is also important to note that such functionalities are not permitted in Solidity. When you call functions by using super in multiple inheritance, the most derived contract would have the first preference.<\/p>\n

You should also know about the optional availability of Solidity inheritance constructor and the fact that smart contracts have default constructors. Developers could specify constructor arguments in two different ways. The importance of inheritance also points towards marking different contracts associated with a parent-child dynamic. On top of it, the similarity between Solidity and Python in terms of inheritance rules also provides flexibility for transition of programmers to smart contract development tasks.<\/p>\n

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Working of Inheritance\u00a0<\/b><\/h3>\n

The term \u2018inheritance\u2019 refers to the process in which the properties and assets of parents pass to the children. You must compare Solidity inheritance with similar relationships. The base contract is the contract that helps other contracts in inheriting features. On the other hand, the derived contract is the contract that inherits features of the base contract.<\/p>\n

The base contract and derived contracts are described as parent and child contracts. However, the working of inheritance in Solidity uses only public and internal modifiers. Here are some of the important highlights in the working of inheritance for Solidity smart contracts.<\/p>\n