Conventions used

There are a number of text conventions used throughout this book.

CodeInText: Indicates code words in text, database table names, folder names, filenames, file extensions, pathnames, dummy URLs, user input, and Twitter handles. Here is an example: "They use a library called 0x.js that allows you to interact with relayers with a high-level, clean interface that feels great to use."

A block of code is set as follows:

pragma solidity 0.5.0;
contract Example {
    uint256 myStateVariable;
    string myOtherStateVariable;
    function example(){
        uint256 thisIsNotAStateVariable;
    }
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

function example(string memory myText) public {
    require(bytes(myText)[0] != 0);
}

Any command-line input or output is written as follows:

$ git clone https://github.com/merlox/dapp

Bold: Indicates a new term, an important word, or words that you see onscreen. For example, words in menus or dialog boxes appear in the text like this. Here is an example: "Go to the Droplets sections and click on Create Droplet."