Citadel

Accepts Bitcoin payments via on-chain transactions.

Accepts Bitcoin payments via the Lightning Network.

Accepts payments in alternative cryptocurrencies.

Accepts traditional credit and debit card payments.

Nodes warranties typically cover defects in materials and workmanship for a specified period after purchase. These warranties vary by manufacturer and product, so it's essential to understand the terms and conditions before purchasing a node.

Some manufacturers decide to sell their product 'as is'. This is a term commonly used in the context of sales transactions, indicating that the product is being sold in its current condition, without any warranties or guarantees from the seller. It essentially means that the buyer is accepting the item in its current state, with all its potential flaws and issues, and the seller is absolving themselves of responsibility for any defects or problems that may arise after the sale.

Weight of the Bitcoin node device.

Length x Width x Height

- Length: the longest side of the device

- Width: the shorter side of the device

- Height: the vertical dimension of the device

Central processing unit specifications of the node device.

Random access memory capacity of the node device.

Storage capacity and type (SSD, HDD) of the node device.

Wired Ethernet network connectivity support.

Wireless WiFi network connectivity support.

HDMI video output port for connecting displays.

USB ports for connecting peripherals and external storage.

Bluetooth wireless connectivity support.

Mainnet is the term for the real Bitcoin blockchain and network, and is used in contrast with testnet, signet, and regtest networks. Unlike the other networks, which are used for testing purposes, mainnet coins (BTC) have monetary value. When people refer to the Bitcoin network, they are usually referring to mainnet.

Testnet is an alternative Bitcoin blockchain specifically designed for testing purposes. It is a sandbox environment that allows developers, users, and businesses to experiment with new features, applications, and ideas without risking real Bitcoin or disrupting the main Bitcoin network (mainnet). The Testnet is a valuable tool for the Bitcoin community because it enables the development and testing of new technologies, improvements, and features before they are implemented on the mainnet.

The Regression Test Network (regtest) is a parallel blockchain to the Bitcoin blockchain. It works almost identically to the Bitcoin network, but it is used for private development. Regtest is most similar to testnet in that the coins on the regtest network are not monetized. Additionally, regtest is meant solely for private testing; external connections are not enabled and the mining difficulty is set to zero. This allows a regtest user to mine as many blocks as they want, making testing easier.

Signet is a proposed new test network parallel to the Bitcoin network. Like testnet and regtest, signet would be used by developers as a testing environment. Unlike the Bitcoin mainnet or the other test networks, signet would use digital signatures to validate blocks, not a Proof-of-Work system.

Less code means less attack surface which further improves your security.

References

- Green: less than 6 months old

- Yellow: between 6 months and 1 year old

- Red: more than 1 year old

A node with source-available firmware is released through a source code distribution model where the source can be viewed, and in some cases modified, but without necessarily meeting the criteria to be called open-source. Any firmware is source-available as long its source code is distributed along with it, even if the user has no legal rights to use, share, modify, or even compile it. These nodes allow users to review the source code, ensuring transparency and trust in the device's operations. The availability of the source code also facilitates security audits by independent experts and the broader community. This scrutiny helps identify vulnerabilities or weaknesses in the node's design, enabling timely fixes and improvements to enhance overall security.

A node firmware being Free & Open Source (FOSS) means that the source code of the firmware is publicly available and can be freely viewed, used, modified, and distributed by anyone. Users have the legal rights to access, study, modify, and distribute the firmware according to the terms of the open-source license it is released under. This transparency and freedom allow the community to review and contribute to the development of the firmware, ensuring its security, reliability, and trustworthiness.

Open source licenses grant permission for anybody to use, modify, and share licensed software for any purpose, subject to conditions preserving the provenance and openness of the software.

Whilst anyone may inspect the source code of free and open source software for malicious flaws, most software is distributed pre-compiled with no method to confirm whether they correspond.

A build is reproducible if given the same source code, build environment and build instructions, any party can recreate bit-by-bit identical copies of all specified artifacts.

Supports running on Windows operating system.

Supports running on macOS operating system.

Supports running on Linux operating system.

Available as a disk image that can be installed on standard PC hardware.

Can be run as a virtual machine on existing hardware.

Raspberry Pi 4 Model B offers ground-breaking increases in processor speed, multimedia performance, memory, and connectivity compared to the prior-generation Raspberry Pi 3 Model B+, while retaining backwards compatibility and similar power consumption. For the end user, Raspberry Pi 4 Model B provides desktop performance comparable to entry-level x86 PC systems.

With 2-3x the speed of the previous generation, and featuring silicon designed in-house for the best possible performance.

ROCK64 is a credit card sized Single Board Computer powered by Rockchip RK3328 quad-core ARM Cortex A53 64-Bit Processor and support up to 4GB 1600MHz LPDDR3 memory. It provides an eMMC module socket, MicroSD Card slot, Pi-2 bus, Pi-P5+ bus, USB 3.0 and many others peripheral devices interface for makers to integrate with sensors and devices.

The ROCKPro64 is the most powerful single board computer on offer from PINE64, featuring a Rockchip RK3399 hexa-core SoC as well as a quad-core Mali-T860 MP4 GPU and up-to 4GB of dual-channel LPDDR4 system memory. Moreover, the board comes packed with features, including an USB 3.0 and USB type C with DP1.2 port, a full PCIe x4 as well as eMMC module socket. You also get a 40pin header with I2C, SPI, UARTs and GPIOs. The board is backwards compatible with many of the existing PINE64 peripherals, including the Wifi/BT module, camera module and LCD panel but an array of new peripherals specific for the board is also available. All this in the exact same model “A” dimension as the original PINE A64.

ROCK 4 is a Single Board Computer (SBC) in an ultra-small form factor that offers class-leading performance while leveraging outstanding mechanical compatibility. The ROCK 4 offers makers, IoT enthusiasts, hobbyists, PC DIY enthusiasts and others a reliable and extremely capable platform for building and tinkering their ideas into reality.

ROCK 4 has a modern and powerful hexa-core ARM based processor, RK3399 inside, it offers significantly improved performance versus other popular SBC boards. All models are equipped with LPDDR4 3200Mb/s RAM and optional high performance eMMC modules, boost all applications.

Fulcrum is a fast & nimble SPV server for Bitcoin created by Calin Culianu. It can be used as an alternative to Electrs because of its performance.

A Block Explorer is a website or application that allows you to find the details of any block on the blockchain. You can find data such as number of transactions in a block, sender address, recipient address, fees paid, amount sent, block height and block time. By using an explorer hosted on your own node you can query this data privately.

Stay informed about the state of the Bitcoin network with a mempool visualizer. Gain real-time insight into transaction information, fees, confirmation times, and the overall health of the Bitcoin network. Make informed decisions and optimize your Bitcoin transactions while maintaining efficiency and privacy from third parties that may store this data.

CoinJoin is a privacy technique that enhances the anonymity of Bitcoin transactions. It combines multiple users' payments into a single transaction, making it challenging to trace individual funds. CoinJoin ensures that the inputs and outputs of a transaction are mixed with those of others, obscuring the origin of the coins. This technique provides greater privacy by breaking the link between sender and recipient. It's a voluntary process that requires participants to cooperate in creating a joint transaction. By making it difficult to track specific coins, CoinJoin contributes to bolstering privacy and fungibility within the Bitcoin network.

A pruned Bitcoin node is a type of Bitcoin node that saves disk space by not storing the entire blockchain. Instead, it keeps only the most recent blocks and removes older ones. Despite this, pruned nodes can still participate in the Bitcoin network by relaying recent transactions and blocks to other nodes.

Features an official app marketplace for installing additional software.

Supports third-party app marketplaces for additional software options.

Support to backup / restore all the node configuration

Health Checks consist in to constantly monitor the health and availability of the services.

Supports SSL/TLS encryption for secure web interface access.

When communicating with your personal server in a browser context, it is important to ensure that your communication is private and secure.

TOR (The Onion Router) significantly bolsters online privacy by channeling web traffic through a dispersed network of volunteer-operated servers. Through encrypted data transmission and a series of relays, TOR effectively conceals the user's IP address and digital footprint, thwarting attempts by ISPs and governmental bodies to track their online behavior.

Tailscale is zero config VPN that creates a secure network between your Node and your other devices. Even when separated by firewalls or subnets, Tailscale just works.

Tailscale will assign your Node a stable IP and an auto-assigned domain that stays consistent, no matter what network your Node is connected to. It's like a local network that works everywhere.

Tailscale builds on top of WireGuard's Noise protocol encryption, a peer-reviewed and trusted standard.