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You're reading from  Mastering Blockchain Programming with Solidity

Product typeBook
Published inAug 2019
Reading LevelIntermediate
PublisherPackt
ISBN-139781839218262
Edition1st Edition
Languages
Solidity
Tools
Blockchain
Concepts
Blockchain
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Author (1)
Jitendra Chittoda
Jitendra Chittoda
author image
Jitendra Chittoda

Jitendra Chittoda is a blockchain security engineer at ChainSecurity. His day job is to perform security audit on smart contracts and expose security vulnerabilities in Solidity and Scilla contracts. He has also developed a non-custodial, decentralized, P2P lending contracts for ETHLend. The Solidity contracts that he has developed or audited handle over $100 million worth of cryptoassets. He also served as a tech and security advisor in various ICO projects. Before finding his passion for blockchain, he coded in Java for over 11 years. He is the founder and leader of Delhi-NCR-JUG, a non-profit meetup group for Java. He holds a master's degree in computer applications and is regularly invited as a speaker at various conferences and meetups.
Read more about Jitendra Chittoda

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Creating abstract contracts

In an abstract contract, there are only a few functions that don't have the function body defined. You cannot deploy abstract contracts alone. However, you can inherit the contract and provide the definition to each function that's declared in the abstract contract.

If a contract inherits from an abstract contract and doesn't provide the implementation of the function, the inheriting contract would also be considered an abstract contract. Hence, it is the developer's responsibility to ensure that all the functions of the abstract contract are defined. Also, developer tools such as Remix and Truffle would not allow your inherited contract to be deployed.

As shown in the following example, AbstractDeposit is an abstract contract since it has a depositEther() function, and no function body has been provided for it. However, the...

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Mastering Blockchain Programming with Solidity
Published in: Aug 2019Publisher: PacktISBN-13: 9781839218262
© 2019 Packt Publishing Limited All Rights Reserved

Author (1)

author image
Jitendra Chittoda

Jitendra Chittoda is a blockchain security engineer at ChainSecurity. His day job is to perform security audit on smart contracts and expose security vulnerabilities in Solidity and Scilla contracts. He has also developed a non-custodial, decentralized, P2P lending contracts for ETHLend. The Solidity contracts that he has developed or audited handle over $100 million worth of cryptoassets. He also served as a tech and security advisor in various ICO projects. Before finding his passion for blockchain, he coded in Java for over 11 years. He is the founder and leader of Delhi-NCR-JUG, a non-profit meetup group for Java. He holds a master's degree in computer applications and is regularly invited as a speaker at various conferences and meetups.
Read more about Jitendra Chittoda

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