fraga/cs-api

Bitcoin full node as a C# library

C# API

Bitcoin full node as a C# library

Knuth C# API is a high performance implementation of the Bitcoin protocol focused on users requiring extra performance and flexibility. It is a Bitcoin node you can use as a library.

Prerequisites

Knuth C# API is a wrapper over our C++ libraries, therefore in order to use the C# library we will need the toolchain to build the C++ libraries. Don't panic, you won't have to manually build our C++ libraries, you just have to provide some prerequisites, our build system will take care of the rest.

• .NET Standard 2.0 compatible implementation. We suggest .Net Core 3.1.
• Python PIP package-management system.

To speed up the compilation, we provide some pre-built C++ libraries for some common computer platforms, but case there are no pre-built binaries for your platform, our build system will automatically try to build from source code. In such a scenario, the following requirements must be added to the previous ones:

• C++17 conforming compiler. Could be GCC8, Clang8 or Visual Studio 2019
• CMake building tool, version 3.8 or newer.

Getting started

1. Create a new C# console project:

$ mkdir HelloKnuth
$ cd HelloKnuth
$ dotnet new console

2. Add a reference to our C# API package:

$ dotnet add package kth-bch

3. Edit Program.cs and write some code:

using System;
using System.Threading.Tasks;
using Knuth;

namespace HelloKnuth {
    public class Program {
        private static bool running_;

        static async Task Main(string[] args) {
            Console.CancelKeyPress += OnSigInterrupt;

            var config = Knuth.Config.Settings.GetDefault(NetworkType.Mainnet);
            using (var node = new Knuth.Node(config)) {
                await node.LaunchAsync();
                Console.WriteLine("Knuth node has been launched.");

                var height = await node.Chain.GetLastHeightAsync();
                Console.WriteLine($"Current height in local copy: {height.Result}");

                if (await ComeBackAfterTheBCHHardFork(node)) {
                    Console.WriteLine("Bitcoin Cash has been created!");
                }
            }
            Console.WriteLine("Good bye!");
        }

        private static async Task<bool> ComeBackAfterTheBCHHardFork(Node node) {
            UInt64 hfHeight = 478559;
            while (running_) {
                var res = await node.Chain.GetLastHeightAsync();
                if (res.Result >= hfHeight) return true;
                await Task.Delay(10000);
            }
            return false;
        }

        private static void OnSigInterrupt(object sender, ConsoleCancelEventArgs args) {
            Console.WriteLine("Stop signal detected.");
            args.Cancel = true;
            running_ = false;
        }
    }
}

4. Enjoy Knuth node as a C# library:

$ dotnet run

Repository under construction, the first version will be released shortly.