The Core Lightning implementation has been in production use on the Bitcoin mainnet since early 2018, with the launch of the Blockstream Store. We recommend getting started by experimenting on testnet (or regtest), but the implementation is considered stable and can be safely used on mainnet.
The following steps will get you up and running with Core Lightning:
Operating System
Core Lightning is available on Linux and macOS. To run Core Lightning on Windows, consider using docker.
Hardware
The requirements to run a Core Lightning node, at a minimum, are 4 GB RAM, ~500 GB of storage if you're running a Bitcoin Core full node, or less than 5 GB of storage if you run a pruned Bitcoin Core node or connect to Bitcoin Core remotely. Finally, a trivial amount of reliable network bandwidth is expected.
For a thorough understanding of the best hardware setup for your usage / scenario, see guidance at hardware considerations.
Bitcoin Core
Core Lightning requires a locally (or remotely) running bitcoind (version 0.16 or above) that is fully caught up with the network you're running on, and relays transactions (ie with blocksonly=0). Pruning (prune=n option in bitcoin.conf) is partially supported, see here for more details. You can also connect your Core Lightning node to a remotely running Bitcoin Core, see here to learn how.
Node allows developers to write JavaScript code that runs directly in a computer process itself instead of in a browser. Node can, therefore, be used to write server-side applications with access to the operating system, file system, and everything else required to build fully-functional applications. Node.
To see if Node is installed, open the Windows Command Prompt, Powershell or a similar command line tool, and type node -v . This should print the version number so you'll see something like this v0.
The usual way to run a Node.js program is to run the globally available node command (once you install Node.js) and pass the name of the file you want to execute. While running the command, make sure you are in the same directory which contains the app.js file.
First off, you won't need to set up and run a third-party web server like Apache HTTPD or NGINX or place your content within the /var/www/html directory hierarchy. That's because Node.js is, among other things, a web server framework.
Node. js is sometimes misunderstood by developers as a backend framework that is exclusively used to construct servers. This is not the case; Node.js can be used on the frontend as well as the backend.
We strongly recommend using a Node version manager like nvm to install Node.js and npm. We do not recommend using a Node installer, since the Node installation process installs npm in a directory with local permissions and can cause permissions errors when you run npm packages globally.
You'll need to open a new terminal (command prompt) for the node and npm command-line tools to be on your PATH. To test that you have Node.js installed correctly on your computer, open a new terminal and type node --version and you should see the current Node.js version installed.
You can right-click a front panel object or its block diagram terminal, select Create»Property Node or Create»Invoke Node from the shortcut menu, and select a property or method from the list to create a property or method for the object.
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