Neo Blockchain Toolkit - Domain Sample

This repo contains the Domain Smart Contract sample with additional assets that can be used with the Neo Blockchain Toolkit. This readme covers the basics of how to use emulated storage for the Neo Smart Contract Debugger.

Prerequisites

• .NET Core 2.2 SDK
• Visual Studio Code (v1.37 or later)
• NEON-DE compiler
• Neo Smart Contract Debugger

Further instructions on installing the NEON-DE compiler and Neo Smart contract debugger are available in the Neo Blockchain Toolkit Quickstart

Emulated Storage

Neo Smart Contracts can store key/value byte array pairs in storage for later access. The Neo Smart Contract Debugger provides an emulated storage service for contracts being debugged to get, put and delete key/value pairs similar to how a real Neo blockchain instance works. However, the debugger stores these storage updates in memory and they are discarded at the end of the debugging session. Additionally, pre-existing storage data can be specified in the launch.json file.

This sample contract demonstrates a simple DNS-style registry. Records can be retrieved, updated and deleted. The launch.json file included in this repository demonstrates how to configure emulated storage.

There are four profiles in launch.json for this contract:

• query empty - query for a record when storage is empty
• query full - query for a record when storage contains a relevant record for that key
• register succeed - create a record when storage is empty
• register fail - create a record when storage already contains a relevant record for that key