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All Projects → pokkst → bitcoincashj

pokkst / bitcoincashj

Licence: Apache-2.0 license
A library for working with Bitcoin Cash

Labels

librarybitcoinblockchainbitcoinjbip47bip44bip39bip32bip70nftbitcoincashbitcoincashjslpschnorrcashaddrasertbip37

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WARNING

This repository is no longer maintained. Please see the latest changes here: http://4hsesnr6mjb4qrflgf5gezjaszzoqnnisin7ywzbsv6pgcxysiaq.b32.i2p/pokkst/bitcoincashj

To access, please install I2P: https://geti2p.net and configure your browser's proxy settings to use an HTTP proxy at 127.0.0.1:4444.

This Java library for Bitcoin Cash is a fork of bitcoinj. Please read the feature list below for all the features I've implemented since becoming the maintainer.

Please consider donating: bitcoincash:qptnypuugy29lttleggl7l0vpls0vg295q9nsavw6g

Welcome to bitcoincashj

The bitcoincashj library is a Java implementation of the Bitcoin Cash (BCH) protocol. This library is a fork of Mike Hearn's original bitcoinj library aimed at supporting the Bitcoin Cash eco-system.

This bitcoincashj is a fork of ProtocolCash's, which is a fork of the original bitcoincashj, which forked from Mike Hearn's original bitcoinj. Confusing, right?

This fork of bitcoincashj has many changes and fixes since the original bitcoincashj (bitcoinj.cash) library, like:

  • CTOR support
  • 32MB block support
  • Native Cash Account integration (trustless registration and sending)
  • SLP tokens
  • SLP NFTs (Non-Fungible Tokens)
  • Standard BIP44 derivation (m/44'/145'/0' for BCH, m/44'/245'/0' for SLP)
  • UTXO management when sending coins using SendRequest.utxos
  • BIP47 Reusable Payment Codes support
  • OP_CHECKDATASIG support
  • OP_REVERSEBYTES support
  • Schnorr signatures
  • Schnorr signatures in P2SH multisig
  • Checking if node peers support NODE_XTHIN, NODE_GRAPHENE services
  • aserti3-2d Difficulty Adjustment Algorithm
  • Testnet4 support
  • Scalenet support
  • Memo protocol functions
  • Flipstarter pledging support
  • Up-to-date hardfork checkpoints
  • Up-to-date DNS seeds
  • Up-to-date IP address seeds

It allows maintaining a wallet and sending/receiving transactions without needing a full blockchain node. It comes with full documentation and some example apps showing how to use it.

Technologies

  • Java 7+ and Gradle 4.4+ for the core module
  • Java 8+ and Gradle 4.4+ for tools and examples
  • Java 11+ and Gradle 4.10+ for the JavaFX-based wallettemplate
  • Gradle - for building the project
  • Google Protocol Buffers - for use with serialization and hardware communications

Getting started

To get started, it is best to have the latest JDK and Gradle installed. The HEAD of the master branch contains the latest development code and various production releases are provided on feature branches.

Building from the command line

Official builds are currently using with JDK 8, even though the core module is compatible with JDK 7 and later.

To perform a full build (including JavaDocs and unit/integration tests) use JDK 8+

gradle clean build

If you are running JDK 11 or later and Gradle 4.10 or later, the build will automatically include the JavaFX-based wallettemplate module. The outputs are under the build directory.

To perform a full build without unit/integration tests use:

gradle clean assemble

Building from an IDE

Alternatively, just import the project using your IDE. IntelliJ has Gradle integration built-in and has a free Community Edition. Simply use File | New | Project from Existing Sources and locate the build.gradle in the root of the cloned project source tree.

Building and Using the Wallet Tool

The bitcoinj tools subproject includes a command-line Wallet Tool (wallet-tool) that can be used to create and manage bitcoinj-based wallets (both the HD keychain and SPV blockchain state.) Using wallet-tool on Bitcoin's test net is a great way to learn about Bitcoin and bitcoinj.

To build an executable shell script that runs the command-line Wallet Tool, use:

gradle bitcoinj-tools:installDist

You can now run the wallet-tool without parameters to get help on its operation:

./tools/build/install/wallet-tool/bin/wallet-tool

To create a test net wallet file in ~/bitcoinj/bitcoinj-test.wallet, you would use:

mkdir ~/bitcoinj
./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/bitcoinj/bitcoinj-test.wallet create

To sync the newly created wallet in ~/bitcoinj/bitcoinj-test.wallet with the test net, you would use:

./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/bitcoinj/bitcoinj-test.wallet sync

To dump the state of the wallet in ~/bitcoinj/bitcoinj-test.wallet with the test net, you would use:

./tools/build/install/wallet-tool/bin/wallet-tool --net=TEST --wallet=$HOME/bitcoinj/bitcoinj-test.wallet dump

Note: These instructions are for macOS/Linux, for Windows use the tools/build/install/wallet-tool/bin/wallet-tool.bat batch file with the equivalent Windows command-line commands and options.

Example applications

These are found in the examples module.

Where next?

Now you are ready to follow the tutorial.

Contributing to bitcoincashj

If you would like to help contribute to bitcoincashj, feel free to make changes and submit pull requests.

Note that the project description data, including the texts, logos, images, and/or trademarks, for each open source project belongs to its rightful owner. If you wish to add or remove any projects, please contact us at [email protected].