Bitcoin Cash is one chain of Satoshi Nakamoto's blockchain invention which was deliberately hard-forked on August 1st, 2017. It shares the whitepaper, first block, and all bitcoin block history prior to the fork. It attempts to implement the central idea outlined in that paper.

Below is a copy of the original nine page whitepaper:

Archived copy of the bitcoin whitepaper from bitcoin.org.
bitcoin whitepaper via ipfs.
Websites hosting the bitcoin whitepaper, with sha256 hashes calculated hourly.
An adapted copy encoded in the member protocol on 2021-01-21
Instructions and code for building the original paper encoded on the blockchain on 2013-04-06.

State of the Project

Three Years In: A Bitcoin Cash Update From One of Its Founders - by Jonald Fyookball

Getting Started

BCH Info - Multilingual site for general information about bitcoin cash.
Bitcoin.com Getting Started - Comprehensive introduction for general audiences.

Open-Source Wallets

Below are non-custodial open-source wallets that use features specific to Bitcoin Cash.

Mobile

Electron-Cash - Android [src] and iOS [src] versions available with more limited functionality.
pokket.cash [src] - Android wallet with SLP, BIP70 and sms features.
neutrino [src] - Android wallet with advanced privacy features.
Badger Mobile [src] - Mobile App wallet with SLP and CashID support for iOS [src] and Android [src]
bread - Multicoin wallet for Android [src] and iOS [src]
edge.app [src] - Edge Wallet for iOS and Android.

Desktop

Electron-Cash [src] - the awesome SPV wallet for Bitcoin Cash.

Electron-Cash Plugins

Flipstarter Plugin - plugin for crowdfunding.
Mecenas Plugin - recurring payments.
Last Will - dead man smart contract creation.
More Comprehensive List - hosted by im_uname.

Cli

bchwallet - a secure Bitcoin Cash wallet daemon written in Go (golang)
openbazaar wallet - an SPV wallet in Go (golang) developed for openbazaar2
bitcore-wallet - A command line wallet used for BitPay wallets.

Browser

blockparty [src] [docs] - A simple in-browser web wallet using bitbox.earth.
mint [src] - Non-custodial web-based tool to manage your SLP tokens.
nito [src] - Web wallet designed for easily on-boarding of new users.

Paper/Offline Generator

Cash Address Generator - reputable javascript address generator suitable for offline use.
BCH Gifts - generate reclaimable preloaded paper private keys as gifts.

Projects Built on Bitcoin Cash

Shipyard

These are up and coming projects in alpha stage (may not be suitable for large transactions):

AnyHedge [whitepaper] [lib] - A Decentralized Hedge Solution for Arbitrary Assets on Bitcoin Cash
causes.cash [src] - a site for creating your own fundraising campaign.
Neutron Cash [release] [src] - A desktop neutrino wallet using bchwallet and electron.
Bitcoin Cash Jobs - Bitcoin Cash job board.
PSF wallet [src] - Static javascript web-wallet using gatsby react from the permissionless software foundation.

Shipped

All of these apps are mostly stable and active. Always check the notes of a particualar project before risking a large sum of value. Links are checked on a weekly basis, but function is not checked.

read.cash - a conventionally hosted long-format blogging platform, with BCH tipping for content.
member.cash - longer format social media platform with voting, tipping, moderation and filtering.
noise.cash - A Bitcoin Cash powered micro-blogging platform.
memo.cash - short message social media site with decentralized SLP token exchange.
lazyfox - a Bitcoin Cash powered question and answer / tasking platform.
flipstarter [Introduction] [src] - a crowd funding app using anyone can pay multisig transactions.

Decentralized Marketplace

local.bitcoin.com - Decentralized exchange and marketplace with non-custodial escrow.
Detoken - Decentralized financial services using bitcoin cash script. (See: Prohibited Jurisdictions on 403 Error)

Entertainment

blockchain.poker - Texas Hold'em using zero-conf for BCH deposits, BTC and BSV supported.
craft.cash [src] - Voxel world stored on Bitcoin Cash.
bch.games - dice and numbers game.
Satoshi dice - a provably fair dice game.
Spin BCH - Spinning wheel based gambling using zero-conf

Faucets

BCH Testnet Faucet [src] - Fullstack.cash faucet for tBCH.
HONK Faucet - SLP faucet for honk.

Network

Blockchain Explorer [src] - Database-free, self-hosted Bitcoin Cash explorer, via RPC, (also available for Testnet)
SLP Explorer [src] - Open source explorer for SLP tokens.
bitcoinfees.cash - bitcoin chain fee juxtaposition.
privacy stats - recent list and totals of shuffles & fusions.
doublespend.cash - view Bitcoin Cash double spend attempts.
tx street - transaction visualizer, updated with popular protocols.
fork.lol - Site to monitor network health in relation to BTC.
Johoe's Bitcoin Mempool Statistics [src] - Colorful mempool graphs.
Electrum Server Status - A 1209k hosted list of electrum servers

SLP Token Projects

Electron-Cash SLP Edition
Flex [whitepaper] - Token powering CoinFLEX exchange.
FlexUSD - Yield producing stable coin.
mist - a mineable SLP token using a proof-of-work covenant contract
Honk Token [whitepaper] - A gambling/gaming/multipurpose SLP token.
Honest Coin - A fully regulated, 1:1 U.S. Dollar-backed stablecoin.
SpiceToken - A meme token for social tipping.
SLP wallet generator [src]- Offline generator for Simple Ledger addresses.
cryptophyl - an SLP exchange (deprecated, see: detoken)

Services & Bots

Bitcoin Mining Parlament [src] [whitepaper] - Miner voting and chat.
chaintip - An on-chain non-custodial tipping bot for reddit/twitter & github.
tipbitcoin.cash - Live tipping bot for video streamers.
WhaleAlertBCH [src] - A twitter whalebot for BCH.
gitcash - A custodial tipping bot for github.
Chaintip Bounties - BCH bot for github bounties.
BCH Pizza - BCH shared bounty site for pizza shop adoption.

Utilities

CashAccount - Online utility for cashaccounts (address handles).
Bitcoin.com Tools - A mix of Bitcoin utilities.

Web

PayButton [src] - a simple html (or react component) button to accept Bitcoin Cash on a website.
Bitcoin Paywall [src] - Wordpress paywall plugin

In the Boneyard

These ships are apparently in long term storage

stack exchange - an unsuccessful initiative to create a Bitcoin Cash stack exchange.

Merchants and Services Accepting Bitcoin Cash

A Short List

These vendors have accepted bitcoin for years and are committed (or sympathetic) toward the idea of electronic cash payments.

Although some of these may appear to only accept Bitcoin (BTC), they do, in fact, accept Bitcoin Cash also.

Namecheap - dns, ssl and some packaged hosting.
keys4coins - Buy PC games and gift cards with cryptocurrency.
alfa.top - Buy mobile top-up (credit) and internet with cryptocurrency.
CheapAir - for your travel needs.
items sold by Newegg - good for a great headset.
Lanieri - makes a good suit.
partsoven - for that 3rd dimension of building.
AdaFruit - hardware do-dads via bitpay

Geographic lists

member map - permanent on-chain geographic tags utilizing extensions to the memo protocol.
Bitcoin.com map - website and mobile app for discovering merchants, formerly marco coino.
Greenpages map - merchant finder with advanced filtering.

Projects dedicated to listing or enabling eCommerce.

The Accept Bitcoin Cash Initiative - list of merchants and stores.
Bitpay Directory - partial list of websites using bitpay as a payment processor (sometimes outdated).
Purse.io - service to privately purchase goods on Amazon.com (US) at a discount.
CryptoToPayPal - Merchant paypal to crypto or send cryptocurrencies to paypal.

Some Charities and Foundations

Just some good charities for the world at large.

Tails - The Amnesic Incognito Live System, is a security-focused Debian-based Linux distribution aimed at preserving privacy and anonymity.
Save the Children - A United Kingdom based charity, founded in 1919, to improve the lives of children through better education, health care, and economic opportunities, as well as providing emergency aid in natural disasters, war, and other conflicts. (Cryptocurrency donations are powered by The Giving Block)
Electronic Freedom Foundation - dedicated to ensuring that technology supports freedom, justice, and innovation for all the people of the world.
Bitpay Charity Directory A list of charities that accept Bitcoin Cash and other cryptocurrencies.

eCommerce Merchant Resources

Bitcoin Cash Open-Source plugins

CryptoWoo for WooCommerce - Bitcoin Cash integration for CryptoWoo

BCH-to-Fiat Payment Processors

BitPay developer Integrations [api docs]
Coinbase - Merchant integrations for coinbase.
GoCoin - GoCoin integrations, libraries & API docs.

Loyalty Programs

HoneyPay - Customer loyalty point card system using SLP.

Payment Processor Status

status.coinbase.com - Dashboard with subscriptions endpoints and post-mortems.
status.bitpay.com - Current status with recent incidents.

Documentation

Roadmaps

Coin Dance list - with broader developments and proposals in various states from many groups.

General

Full-Stack how-to - Chris Troutner's introduction to developing on Bitcoin Cash
developers.cash - many useful resources
Bitcoin.com Developer Resources - Tooling and documentation developed by bitcoin.com.
tutorial.cash - User video tutorials.
Learn Bitcoin Cash - Early general introduction to Bitcoin Cash.

Base Protocol

Base Protocol Reference - maintained by Bitcoin Unlimited.

Secondary protocols

Bitcoin Cash Standards is a site dedicated to collecting, some of which are listed below:

Cashaddr - Format for Bitcoin Cash addresses.
Electrum Cash Protocol [src] - Protocol for SPV clients and servers.
Payment Requests Specification (BIP-0070) - For dealing with invoice style payments at specific amounts.
Cash Accounts - attach a human readable name to Bitcoin Cash addresses.
Memo Protocol - for the on-chain tweet style social media app.
Memo with Member extensions - for creating a reddit/hn style app.
Simple Ledger Protocol (SLP) [specs] - for handling ERC-20 style tokens.
Simple Ledger Postage Protocol - Protocol for sending SLP tokens without BCH "gas".
CashShuffle [spec] - a privacy protocol for combining transactions with others, splitting to the lowest common amount.
CashFusion [spec] - a privacy protocol for privately and trustlessly joining coin amounts.
CashID - Specification using Bitcoin Cash for secure authentication.
Avalanche [snowglobe spec] [🐉implementation (golang)] - local-state reconciliation
Price Oracle [🐉implementation] - Price oracle work in progress.

Bitcoin Script

Cashscript [src] [playground] - a solidity-style language that compiles to Bitcoin Cash Script.
meep - a command line Bitcoin Cash script debugger.
bitauth ide [src] [video intro] - an integrated development environment for bitcoin authentication.
spedn [src] [docs] - a high level smart contract language that compiles to Bitcoin Cash Script.

Software

Full Nodes

BCHN [src] [docs] - a descendant of the Bitcoin Core and Bitcoin ABC software projects with independent development team. C/C++.
BitcoinUnlimited [src] - a full node implentation focused on supporting user needs, C/C++.
Flowee the Hub [src] - a node supporting a suite of software focused on payment integration. C++
bchd [src] [docs] - alternative implementation written in Go (golang)
Bitcoin Verde [src] [docs] - java implementation with the goal of being interoperable with mining nodes.
Knuth [src]- a high performance implementation of the Bitcoin protocol focused on applications needing extra capacity and resilience.

Full Node Developer Resources

Bitcoin Cash Research - Site dedicated to technical research on Bitcoin Cash.
Bitcoin Cash Discussions - Site for hosting live meetings and discussions about protocols
SLP Unit Tests - Test vectors for ensuring that validators of the Simple Ledger Protocol follow consensus.
Future of Bitcoin Cash [channel] - Hosts - developer meetings.

Open-Source Teams Building on Bitcoin Cash

If you want to go fast, go alone. If you want to go far, go together.

-- An African Proverb.

There are various groups developing software stacks & apps for the broader ecosystem.

Simple Ledger [repos] - Group leading SLP token integration. (Typescript & Python)
General Protocols [repos] - Team researching and developing protocols for non-custodial and trustless networks using BitBox. (Typescript and Javascript)
Electron Cash [repos] - Team maintaining a desktop SPV wallet with plugins and mobile app (Python)
Bitcoin.com [repos] - Prolific group developing webapps, mobile apps, and new tooling, deployed at bitcoin.com. (Typescript with some Javascript et al.)
Flowee [repos] - Team maintaining a non-mining full node and services to access the Bitcoin Cash network. (C++, NodeJs et al)
gcash [repos] - Team building apps, a wallet and tooling using an alternative full node directly. (Golang)
FullStack Cash [repos] - Team building web/ipfs apps based on BitBox compatible stack. (Javascript)

Simple Payment Verification (SPV)

Fulcrum - A fast & nimble SPV Server for Bitcoin Cash.
ElectrsCash - Electron Cash Server, rust implementation.
ElectronX [docs] - A reimplementation of Electrum-Server for a future with bigger blocks. ⚠️ See changlog note v1.15.0 ⚠️
Electron Cash ElectronX [docs] - Electron Cash maintained version of ElectrumX. ⚠️ See note on main branch above ⚠️

Simple Ledger Protocol (SLP Token) Enabled Tooling

slpjs - library for interacting with SLP tokens, dependent on bitbox.
SLPDB [src] [doc] - simpleledger indexer
SLP Socket [src] [doc] - simpleledger streaming service
gs++ [src] [doc] - a fast SLP indexer, validator, and graph search server.
SLP Stream [src] [doc] - a frontend API for GS++ that provides a streaming output of new transactions.
goslp - SLP go libraries.
SLP Indexer - bitcoin.com indexer.
SLP SDKs - for android and iOS.
SLP Icons - Hosted icons for slp tokens.

Libraries & SDKs

Developer tools - Page devoted to high level developer tools.

Language Agnostic

mainnet [tutorial] [rest spec] - Typescript library, also available via rest api, or over rest from python, golang, php generated clients, et. al
Insomnia [src] - Swagger/OpenAPI3 specification for ElectrumX
BitBox OpenAPI 3 (Swagger) spec - for rest.bitcoin.com see: openapi-generator

Typescript

PayButton [src] - Front end library that makes it easier to accept Bitcoin Cash by adding a buy button.
Bitbox SDK [docs] [src] - library for interacting with BCH via rest.bitcoin.com.
Badger SDK - browser extension wallet supporting BCH and SLP on webpages.
Libauth [src] - an ultra-lightweight, zero-dependency library for Bitcoin Cash and Bitauth applications. (Formerly bitcoin-ts.)
electrum-cash [docs] [tutorials] - JavaScript library that lets you connect with one or more Electrum servers.
flowee-js [docs] [src] - Bindings for using Flowee applications and libraries with the NodeJS JavaScript engine.
mainnet-js [src] - Typescript library, also available over rest.
bchd grpc web-client - protobuf based javascript client for interacting with bchd full nodes.

Javascript

bchjs [docs] - JavaScript Libraries based on BITBOX.
electrum-cli [src] - Super simple command line electrum client.
signup.cash [src] - Non-custodial platform as a service for building decentralized apps.
bitcore-lib-cash - javaScript library, maintained by bitpay.

Python

bitcash [src] - python3 library.
bchd python bindings - sample protobuf based python client for bchd.
jtoomim/p2pool - jtoomim fork of bitcoin pool mining software.

Java

bitcoincashj - Bitcoin Cash library for Java

C

Breadwallet Core - SPV bitcoin C library.

PHP

cashp - Library for BCH and SLP tokens.

README.md

Contents

Whitepaper