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Experimental digital currency with post quantum signature scheme

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Abelian Build Status

Copyright (c) 2019 The Abelian Project.
Portions Copyright (c) 2014-2019 The Monero Project.
Portions Copyright (c) 2012-2013 The Cryptonote developers.

Table of Contents

Development resources

Introduction

Abelian is a cryptocurrency platform, which aims to achieve both privacy and accountability using post-quantum cryptographic techniques. Traditional cryptocurrencies use pseudonyms and achieve limited anonymity as transactions on the cryptocurrency platforms are traceable. Some `privacy coins’ achieve a higher level of anonymity by making transactions on their platforms untraceable. Furthermore, those privacy coins also strive to hide the amount in each transaction. Accountability means that users can choose to allow a third party, such as a regulatory body, to trace their transactions and access information regarding the amount of each transaction, while at the same time, ensure that their transactions remain anonymous and untraceable to the rest of the platform.

The Abelian platform is developing and adopting well-studied cryptographic algorithms with their security being based on hard problems such as Learning With Errors (LWE), which are as hard to solve as several worst-case lattice problems, and are not known to have any efficient solution in quantum computing. The Abelian research and development group is also building new lattice-based cryptographic primitives for enhancing the efficiency, privacy and security of the Abelian cryptocurrency platform. Led by Dr. Duncan Wong, the R&D group consists of scholars from Shanghai JiaoTong University, Nanyang Technological University, University of Wollongong, and experienced Crypto & Blockchain developers from CryptoBLK.

Privacy: In Abelian, proven technologies including linkable ring signature, cryptographic commitment scheme, and zero-knowledge proof are incorporated into the design to offer users uncompromising privacy. Abelian is focusing on providing quantum-resistance and privacy with optional accountability.

Accountability: Abelian will apply a cryptographic primitive called verifiable encryption to enable and abide by regulations, such as AML and taxation policies, in the design to solve concerns from enterprises. Abelian aims to develop a post-quantum anonymous digital signature that can support optional accountability. The system allows a user to produce a digital signature that is fully anonymous to the public but can be traced by a designated authority (or a combination of several authorities) chosen by the signer. Different authorities could be designated by a signer for different types of transactions. It allows an authority to passively monitor transactions under its supervision while maintaining user privacy against other players in the system.

Quantum-safe: The privacy and accountability features of Abelian are built on Lattice-based cryptography, which enables post-quantum security. When combined with a compatible stealth address mechanism that has been developed in the project, the system will ensure security, anonymity and efficient wallet management for Abelian coin in the post-quantum era.

More information on the project can be found on the website and in the whitepaper.

Abelian is an open source project, and we encourage contributions from anyone with something to offer. For more information on contributing, please contact info@abelianfoundation.org

Decentralization: The utility of monero depends on its decentralised peer-to-peer consensus network - anyone should be able to run the monero software, validate the integrity of the blockchain, and participate in all aspects of the monero network using consumer-grade commodity hardware. Decentralization of the monero network is maintained by software development that minimizes the costs of running the monero software and inhibits the proliferation of specialized, non-commodity hardware.

About this project

This is the core implementation of Abelian. It is open source and completely free to use without restrictions, except for those specified in the license agreement below. There are no restrictions on anyone creating an alternative implementation of Abelian that uses the protocol and network in a compatible manner.

As with many development projects, the repository on GitLab is considered to be the "staging" area for the latest changes. Before changes are merged into that branch on the main repository, they are tested by individual developers in their own branches, submitted as a pull request, and then subsequently tested by contributors who focus on testing and code reviews. That having been said, the repository should be carefully considered before using it in a production environment, unless there is a patch in the repository for a particular show-stopping issue you are experiencing. It is generally a better idea to use a tagged release for stability.

Anyone is welcome to contribute to Abelian's codebase! If you have a fix or code change, feel free to submit it as a pull request directly to the "master" branch. In cases where the change is relatively small or does not affect other parts of the codebase it may be merged in immediately by any one of the collaborators. On the other hand, if the change is particularly large or complex, it is expected that it will be discussed at length either well in advance of the pull request being submitted, or even directly on the pull request.

License

See LICENSE.

Contributing

If you want to help out, see CONTRIBUTING for a set of guidelines.

Compiling Abelian from source

Dependencies

The following table summarizes the tools and libraries required to build. A few of the libraries are also included in this repository (marked as "Vendored"). By default, the build uses the library installed on the system, and ignores the vendored sources. However, if no library is found installed on the system, then the vendored source will be built and used. The vendored sources are also used for statically-linked builds because distribution packages often include only shared library binaries (.so) but not static library archives (.a).

Dep Min. version Vendored Debian/Ubuntu pkg Arch pkg Fedora Optional Purpose
GCC 4.7.3 NO build-essential base-devel gcc NO
CMake 3.5 NO cmake cmake cmake NO
pkg-config any NO pkg-config base-devel pkgconf NO
Boost 1.58 NO libboost-all-dev boost boost-devel NO C++ libraries
OpenSSL basically any NO libssl-dev openssl openssl-devel NO sha256 sum
libzmq 3.0.0 NO libzmq3-dev zeromq cppzmq-devel NO ZeroMQ library
OpenPGM ? NO libpgm-dev libpgm openpgm-devel NO For ZeroMQ
libnorm[2] ? NO libnorm-dev ` YES For ZeroMQ
libunbound 1.4.16 YES libunbound-dev unbound unbound-devel NO DNS resolver
libsodium ? NO libsodium-dev libsodium libsodium-devel NO cryptography
libunwind any NO libunwind8-dev libunwind libunwind-devel YES Stack traces
liblzma any NO liblzma-dev xz xz-devel YES For libunwind
libreadline 6.3.0 NO libreadline6-dev readline readline-devel YES Input editing
ldns 1.6.17 NO libldns-dev ldns ldns-devel YES SSL toolkit
expat 1.1 NO libexpat1-dev expat expat-devel YES XML parsing
GTest 1.5 YES libgtest-dev[1] gtest gtest-devel YES Test suite
Doxygen any NO doxygen doxygen doxygen YES Documentation
Graphviz any NO graphviz graphviz graphviz YES Documentation

[1] On Debian/Ubuntu libgtest-dev only includes sources and headers. You must build the library binary manually. This can be done with the following command sudo apt-get install libgtest-dev && cd /usr/src/gtest && sudo cmake . && sudo make && sudo mv libg* /usr/lib/ [2] libnorm-dev is needed if your zmq library was built with libnorm, and not needed otherwise

Install all dependencies at once on Debian/Ubuntu:

sudo apt update && sudo apt install build-essential cmake pkg-config libboost-all-dev libssl-dev libzmq3-dev libunbound-dev libsodium-dev libunwind8-dev liblzma-dev libreadline6-dev libldns-dev libexpat1-dev doxygen graphviz libpgm-dev

Install all dependencies at once on macOS with the provided Brewfile: brew update && brew bundle --file=contrib/brew/Brewfile

FreeBSD one liner for required to build dependencies pkg install git gmake cmake pkgconf boost-libs cppzmq libsodium

Cloning the repository

Clone recursively to pull-in needed submodule(s):

$ git clone --recursive https://gitlab.com/abeliancoin/abelian.git

If you already have a repo cloned, initialize and update:

$ cd abelian && git submodule init && git submodule update

Note: The command will also download and include the required Dilithium library.
https://github.com/pq-crystals/dilithium

Build instructions

Abelian uses the CMake build system and a top-level Makefile that invokes cmake commands as needed.

On Linux and macOS

  • Install the dependencies

  • Change to the root of the source code directory, change to the most recent release branch, and build:

      cd abelian
      make
    

    Optional: If your machine has several cores and enough memory, enable parallel build by running make -j<number of threads> instead of make. For this to be worthwhile, the machine should have one core and about 2GB of RAM available per thread.

    Note: If cmake can not find zmq.hpp file on macOS, installing zmq.hpp from https://github.com/zeromq/cppzmq to /usr/local/include should fix that error.

    Note: The instructions above will compile the most stable release of the Abelian software. If you would like to use and test the most recent software, use git checkout master. The master branch may contain updates that are both unstable and incompatible with release software, though testing is always encouraged.

  • The resulting executables can be found in build/release/bin

  • Add PATH="$PATH:$HOME/abelian/build/release/bin" to .profile

  • Run Abelian with abeliand --detach

  • Optional: build and run the test suite to verify the binaries:

    make release-test

    NOTE: core_tests test may take a few hours to complete.

  • Optional: to build binaries suitable for debugging:

    make debug
  • Optional: to build statically-linked binaries:

    make release-static

Dependencies need to be built with -fPIC. Static libraries usually aren't, so you may have to build them yourself with -fPIC. Refer to their documentation for how to build them.

  • Optional: build documentation in doc/html (omit HAVE_DOT=YES if graphviz is not installed):

    HAVE_DOT=YES doxygen Doxyfile

Running abeliand

The build places the binary in bin/ sub-directory within the build directory from which cmake was invoked (repository root by default). To run in foreground:

./bin/abeliand

To list all available options, run ./bin/abeliand --help. Options can be specified either on the command line or in a configuration file passed by the --config-file argument. To specify an option in the configuration file, add a line with the syntax argumentname=value, where argumentname is the name of the argument without the leading dashes, for example log-level=1.

If you're on Mac, you may need to add the --max-concurrency 1 option to abelian-wallet-cli, and possibly abeliand, if you get crashes refreshing.

Debugging

This section contains general instructions for debugging failed installs or problems encountered with Abelian. First ensure you are running the latest version built from the GitLab repo.

Obtaining stack traces and core dumps on Unix systems

We generally use the tool gdb (GNU debugger) to provide stack trace functionality, and ulimit to provide core dumps in builds which crash or segfault.

  • To use gdb in order to obtain a stack trace for a build that has stalled:

Run the build.

Once it stalls, enter the following command:

gdb /path/to/abeliand `pidof abeliand` 

Type thread apply all bt within gdb in order to obtain the stack trace

  • If however the core dumps or segfaults:

Enter ulimit -c unlimited on the command line to enable unlimited filesizes for core dumps

Enter echo core | sudo tee /proc/sys/kernel/core_pattern to stop cores from being hijacked by other tools

Run the build.

When it terminates with an output along the lines of "Segmentation fault (core dumped)", there should be a core dump file in the same directory as abeliand. It may be named just core, or core.xxxx with numbers appended.

You can now analyse this core dump with gdb as follows:

gdb /path/to/abeliand /path/to/dumpfile

Print the stack trace with bt

  • To run abelian within gdb:

Type gdb /path/to/abeliand

Pass command-line options with --args followed by the relevant arguments

Type run to run abeliand

Analysing memory corruption

There are two tools available:

ASAN

Configure Abelian with the -D SANITIZE=ON cmake flag, eg:

cd build/debug && cmake -D SANITIZE=ON -D CMAKE_BUILD_TYPE=Debug ../..

You can then run the abelian tools normally. Performance will typically halve.

valgrind

Install valgrind and run as valgrind /path/to/abeliand. It will be very slow.

LMDB

Instructions for debugging suspected blockchain corruption as per @HYC

There is an mdb_stat command in the LMDB source that can print statistics about the database but it's not routinely built. This can be built with the following command:

cd ~/abelian/external/db_drivers/liblmdb && make

The output of mdb_stat -ea <path to blockchain dir> will indicate inconsistencies in the blocks, block_heights and block_info table.

The output of mdb_dump -s blocks <path to blockchain dir> and mdb_dump -s block_info <path to blockchain dir> is useful for indicating whether blocks and block_info contain the same keys.

These records are dumped as hex data, where the first line is the key and the second line is the data.

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