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Mastering Blockchain Programming with Solidity

You're reading from   Mastering Blockchain Programming with Solidity Write production-ready smart contracts for Ethereum blockchain with Solidity

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Product type Paperback
Published in Aug 2019
Publisher Packt
ISBN-13 9781839218262
Length 486 pages
Edition 1st Edition
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Author (1):
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Jitendra Chittoda Jitendra Chittoda
Author Profile Icon Jitendra Chittoda
Jitendra Chittoda
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Table of Contents (21) Chapters Close

Preface 1. Section 1: Getting Started with Blockchain, Ethereum, and Solidity
2. Introduction to Blockchain FREE CHAPTER 3. Getting Started with Solidity 4. Control Structures and Contracts 5. Section 2: Deep Dive into Development Tools
6. Learning MetaMask and Remix 7. Using Ganache and the Truffle Framework 8. Taking Advantage of Code Quality Tools 9. Section 3: Mastering ERC Standards and Libraries
10. ERC20 Token Standard 11. ERC721 Non-Fungible Token Standard 12. Deep Dive into the OpenZeppelin Library 13. Using Multisig Wallets 14. Upgradable Contracts Using ZeppelinOS 15. Building Your Own Token 16. Section 4: Design Patterns and Best Practices
17. Solidity Design Patterns 18. Tips, Tricks, and Security Best Practices 19. Assessments 20. Other Books You May Enjoy

Life cycle contracts

The lifecycle contract controls the life cycle flow of functions. For example, using the Pausable contract, we can do the following:

  • Pause/unpause the minting of new tokens
  • Pause/unpause the transfer of tokens
  • Pause/unpause the acceptance of ether

In OpenZeppelin 2.1.1, only one Pausable.sol contract is present in the Chapter09/openzeppelin-solidity/contracts/lifecycle folder. In the future, more contracts may be added.

Pause/unpause functions using Pausable.sol

As we discussed previously, there are some examples of the Pausable contract where it can be used to control the life cycle of a contract. We can use Pausable where administrative functionality is needed.

However, if you use...

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