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: "Mount the downloaded WebStorm-10*.dmg disk image file as another disk in your system."

A block of code is set as follows:

from Crypto.Hash import SHA256
 
hash_object = SHA256.new(data=b'First')
print(hash_object.hexdigest())

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

from Crypto.Hash import SHA256
 
hash_object = SHA256.new(data=b'First')
print(hash_object.hexdigest())

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

$  curl -X POST http://localhost:10332 -H 'Content-Type: application/json' -d '{ "jsonrpc": "2.0", "id": 5, "method": "getversion", "params": [] }'

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: "A different header is created by altering a variable field called nonce in the header."