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DPoPS (Delegated Proof of Private Stake) is a custom consensus mechanism used by XCash-Labs. It combines elements of Delegated Proof of Stake (DPoS), Byzantine Fault Tolerance (BFT), and Verifiable Random Functions (VRF), while preserving user privacy.

Introduction

The XCash-Labs public network is secured by a fixed set of elected delegates responsible for block verification and production.

  • Anyone can run an XCash-Labs node
  • Anyone may register as a delegate
  • Only elected delegates may produce blocks

To become an active block producer, a delegate must be voted into the active delegate set by network participants.

Delegate positions are not permanent. Delegates may lose their position at any time if they fail to meet network expectations or lose community support.

This documentation helps you:

  • understand how DPoPS works
  • set up a delegate node
  • register as a delegate
  • vote and participate in governance
  • securely operate within the network

What would you like to do?

Learn about the consensus

If you want to understand how DPoPS works and what makes it different, start with the technical documentation describing the consensus design and security model.

DPoPS was designed specifically for XCash-Labs and is built to work alongside a privacy-focused blockchain.

Become a delegate

To run a delegate node:

  1. Prepare a server (Linux)
  2. Install the delegate node software
  3. Register yourself as a delegate
  4. Get elected by voters

Vote for a delegate

If you want to support the network without running infrastructure, you can vote for a delegate using your wallet.

See: - Vote & Staking guide

Participate in beta testing

During beta phases:

  • Delegates must follow additional instructions
  • Voters may participate with test rules or limits

Refer to: - Delegate setup guide
- Vote & Staking guide

Key Characteristics

Delegates & Consensus

  • A fixed set of delegates act as block verifiers
  • Block producers are selected using VRF randomness (lowest beta value wins the round)
  • A randomly selected committee of delegates verifies and confirms each block
  • A supermajority of committee signatures is required for finalization
  • The network tolerates a minority of faulty or offline delegates
  • Block production continues as long as consensus thresholds are met

Block Producer Selection

  • Block producers are selected using Verifiable Random Functions (VRF)
  • The delegate with the lowest VRF beta value is selected for block production
  • Selection is random but fully verifiable by the network
  • No delegate can predict or influence future selection

Staking Model

  • Voting uses reserve-proof–based staking
  • Staked coins always remain in your wallet
  • There is no lockup period
  • Funds can be spent at any time

Spending from a wallet used for voting will invalidate the reserve proof and cancel the vote.

  • Wallets do not need to stay online
  • Voting toward shared delegates requires no ongoing maintenance

Voting Rules

  • A minimum stake is required to vote for a delegate
  • Votes are evaluated continuously by the network and applied automatically
  • Changing your vote cancels the previous one
  • There are no voting fees
  • Votes may be changed at any time

Blocks & Data Storage

  • Blocks can be inspected using the XCash-Labs Blockchain Explorer
  • Committee verification data is aggregated off-chain by participating delegates
  • A hash of the combined committee verification data is stored on-chain
  • This approach minimizes blockchain growth while preserving verifiability and auditability

Summary

XCash-Labs DPoPS provides:

  • decentralized governance
  • privacy-preserving staking
  • verifiable randomness
  • no custodial lockups
  • no guaranteed rewards
  • fair and transparent delegate selection