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https://github.com/x-cash-official/xcash-dpops

🗳 Delegated-Proof-of-Private-Stake: First DPoS implementation on a Monero-based coin
https://github.com/x-cash-official/xcash-dpops

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🗳 Delegated-Proof-of-Private-Stake: First DPoS implementation on a Monero-based coin

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X-Cash Delegated Proof of Private Stake



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[![License: MIT](https://img.shields.io/badge/License-MIT-green.svg?style=flat)](https://opensource.org/licenses/MIT)






# X-Cash Delegated Proof of Private Stake



🗳️ The **X-Cash Delegated Proof of Private Stake** (`xcash-dpops`) is a custom variation of a DPoS with DBFT consensus made with privacy coin from the CryptoNote legacy in mind.

The **[X-Cash](https://github.com/X-Cash-Official/xcash-core)** Public Network is governed by delegates elected by XCASH holders to secure and forge new blocks. 



## Table of Content 



  - [Table of Content](#table-of-content)

  - [Features](#features)

  - [License](#license)

  - [Contributing](#contributing)

  - [Documentation](#documentation)

  - [Security](#security)

  - [Installation](#installation)

  - [Maintenance](#maintenance)



## Features



Implementing a **Delegated Proof of Stake** and **Delegated Byzantine Fault Tolerance** consensus in a privacy-based cryptocurrency presents a challenge. Taking inspiration from successful blockchain governance systems, **X-Cash Delegated Proof of Private Stake** proposes a unique solution to bring DPOS and DBFT based consensus to the privacy coin space.



### **Staking**

The **X-Cash Public Network** is secured by delegates, elected in their position by XCASH holders. By providing your **vote through a stake in XCASH**, you are electing a representative to secure the network and forge new blocks, which will in return **split the block reward with you**.



### **DBFT** 

The unique implementation of **DBFT** into the consensus process enables the X-Cash blockchain to become **immune to forks**, henceforth instantly validating new transactions.



### **Randomized Block Producer Selection**  

The selection of the next delegate in charge of forging a block is **completely randomized** through the use of **Verifiable Random Functions (VRF)**, increasing the security of the delegates by preventing attacks to the next block producer.



### **Stake Delegation with Reserve Proofs**

Instead of sending your stake to another wallet to vote toward a delegate, you are providing a **cryptographic reserve proof** of your funds to your delegate, meaning that **you keep complete control of your stake at all times**.



> *Have a look at our* 📜 *[Delegated Proof-of-Private-Stake](https://x-network.io/whitepaper/XCASH_Yellowpaper_DPoPS.pdf) yellow paper to learn more about the technical challenge of integrating this consensus on a Monero-based privacy coin.*



## License



**X-Cash is an open-source project managed by the X-Cash Foundation**.  

We are operating under the [MIT License](LICENSE).



## Contributing



**Thank you for thinking of contributing! 😃**   

If you want to help out, fork the repository, check [CONTRIBUTING](https://github.com/X-CASH-official/.github/blob/master/CONTRIBUTING.md) for a set of guidelines, and check our [opened issues](https://github.com/X-CASH-official/xcash-core/issues).



## Documentation



We are hosting our documentation on **GitBook** 👉 [**docs.xcash.foundation**](https://docs.xcash.foundation/)



> You can contribute directly on our [`gitbook-docs`](https://github.com/X-CASH-official/gitbook-docs) repository.



## Security 



If you discover a security vulnerability, please send an e-mail to [[email protected]](mailto:[email protected]).  

All security vulnerabilities concerning the X-Cash blockchain will be promply addressed.



## Installation



> Every steps of the installation and build instructions are described in our [detailed guide](https://docs.xcash.foundation/dpops/get-started). 



### System Requirements



> In the first beta version, `xcash-dpops` will only run on a **Linux/Unix OS**. We recommend installing it on a Ubuntu VPS/dedicated server (18.04) for best compatibility.



The **recommended** system requirement is designed to be ***future-development proof***, meaning that an hardware update should never be needed and still comfortably handle the `xcash-dpops` program.



|                    | Minimum                                | Recommended                              |

|--------------------|----------------------------------------|---------------------------------------|

| **OS**                 | Ubuntu 18.04                           | Ubuntu 18.04                          |

| **CPU**                | 4 threads, 2.0 GHz or more per thread  | 4 threads, 2.0 GHz or more per thread |

| **RAM**                | 6GB                                    | 32GB                                  |

| **Hard Drive**         | 50GB                                   | 2TB                                   |

| **Bandwidth Transfer** | 100GB per month                        | 500GB per month                       |

| **Bandwidth Speed**   | 100 Mbps                               | 500 Mbps                              |



### Dependencies



The following table summarizes the tools and libraries required to run X-Cash's DPoPS program.



| Dependencies | Min. version | Ubuntu package |

| :--- | :--- | :--- |

| **GCC** | 4.7.3 | `build-essential` |

| **CMake** | 3.0.0 | `cmake` |

| **pkg**-**config** | any | `pkg-config` |

| **OpenSSL** | any | `libssl-dev` |

| **Git** | any | `git` |

| **MongoDB** | 4.0.3 | Install from [binaries](https://www.mongodb.com/download-center/community) |

| **MongoDB C Driver** \(includes BSON libary\) | 1.13.1 | Build from [source](https://github.com/mongodb/mongo-c-driver/releases/) |

| **`xcash-core`** | Latest version | [download the latest release](https://github.com/X-CASH-official/X-CASH/releases) or [build from source](https://github.com/X-CASH-official/X-CASH#compiling-x-cash-from-source) |



### Installation



To install the `xcash-dpops` program and the related services to set up a delegate node, have a look first at our [server setup guide](https://docs.xcash.foundation/dpops/server-setup). 



Then, run the `autoinstaller.sh` script and follow [our guide](https://docs.xcash.foundation/dpops/installation-process#installer-script).

```shell

source <(curl -sSL https://raw.githubusercontent.com/X-CASH-official/xcash-dpops/master/scripts/autoinstaller/autoinstaller.sh)

```



> To build everything from source, follow our **[manual installation](https://docs.xcash.foundation/dpops/installation-process#manual-installation-process)** guide.



### Maintenance



All delegates will be able to use the [maintenance script](https://github.com/X-CASH-official/xcash-dpops/blob/master/scripts/management/xcash-maintenance) to easily view there statistics and to check there system.



```shell

bash -c "$(curl -sSL https://raw.githubusercontent.com/X-CASH-official/xcash-dpops/master/scripts/management/xcash-maintenance)"

```



If you choose to setup the delegate as a shared delegate, you will be able to view additional statistics by using the IP of the delegate in any web browser, as the [Delegates Pool Website](https://github.com/X-CASH-official/delegates-pool-website) is automatically installed.



If you choose to setup the delegate as a solo delegate, you have the option of installing the [Delegates Supervisor](https://github.com/X-CASH-official/delegates-supervisor)