Superior Coin is a secure, private, untraceable currency. Unlike many crypto currencies that are derivatives of Bitcoin, Superior Coin is based on the CryptoNote protocol and possesses significant algorithmic differences relating to blockchain obfuscation. Superior Coins main emission curve will have issued about 1.5 billion coins to be mined in…
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README.md

The Superior Coin

  • Copyright (c) 2014-2018, TheSuperioriorCoin Project
  • This may contain code Copyright (c) 2014-2018, The Monero Project
  • Copyright (c) 2012-1013 Part of this may Include Source Code from The Cryptonote developers
  • This may contain code Copyright (c) 2014-2017, The Monero Project

Development Resources

Build

Operating System Processor Status
Ubuntu 16.04 i686 Ubuntu 16.04 i686
Ubuntu 16.04 amd64 Ubuntu 16.04 amd64
Ubuntu 16.04 armv7 Ubuntu 16.04 armv7
Debian Stable armv8 Debian armv8
OSX 10.10 amd64 OSX 10.10 amd64
OSX 10.11 amd64 OSX 10.11 amd64
OSX 10.12 amd64 OSX 10.12 amd64
FreeBSD 11 amd64 FreeBSD 11 amd64
DragonFly BSD 4.6 amd64 DragonFly BSD amd64
Windows (MSYS2/MinGW) i686 Windows (MSYS2/MinGW) i686
Windows (MSYS2/MinGW) amd64 Windows (MSYS2/MinGW) amd64

Coverage

Type Status
Coverity Coverity Status
Coveralls Coveralls Status
License License

Introduction

SuperiorCoin is a private, secure, untraceable, decentralised digital currency. You are your bank, you control your funds, and nobody can trace your transfers unless you allow them to do so.

Privacy: Superior uses a cryptographically sound system to allow you to send and receive funds without your transactions being easily revealed on the blockchain (the ledger of transactions that everyone has). This ensures that your purchases, receipts, and all transfers remain absolutely private by default.

Security: Using the power of a distributed peer-to-peer consensus network, every transaction on the network is cryptographically secured. Individual wallets have a 25 word mnemonic seed that is only displayed once, and can be written down to backup the wallet. Wallet files are encrypted with a passphrase to ensure they are useless if stolen.

Untraceability: By taking advantage of ring signatures, a special property of a certain type of cryptography, Superior is able to ensure that transactions are not only untraceable, but have an optional measure of ambiguity that ensures that transactions cannot easily be tied back to an individual user or computer.

About this Project

This is the core implementation of Superior. 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 Superior that uses the protocol and network in a compatible manner.

As with many development projects, the repository on Github 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 Superior's codebase! If you have a fix or code change, feel free to submit is 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.

Supporting the Project

Superior development can be supported directly through donations.

Both Superior and Bitcoin donations can be made to Address's below.

The Superior donation address is: 5QaiHzo64sLDo42ky98uXtJ3zswCdpUrk1q5nSidtqovjjiC7FmxRt84Zu3HkpYQX1PLDU72aQMK6Cif4muRxwt3RyZXY6y (viewkey: not updated)

The Bitcoin donation address is: 1Fj6b8tPqbHV5ac2hnxP9RfkgUAYfj9uWd

Note: you can easily donate sup to the Superior donation address by using the donate command. Type help in the command-line wallet for details.

Core development funding and/or some supporting services are also graciously provided by sponsors:

There are also a mining pool that kindly donates a portion of their fees, a list of them can be found on our Bitcointalk post.

License

See LICENSE.

Contributing

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

Vulnerability Response Process

See Vulnerability Response Process.

SuperiorCoin software updates and consensus protocol changes (hard fork schedule)

SuperiorCoin uses a fixed-schedule hard fork mechanism to implement new features. This means that users of Superiro (end users and service providers) need to run current versions and update their software on a regular schedule. Here is the current schedule, versions, and compatibility. Dates are provided in the format YYYY-MM-DD.

Fork Date Consensus version Minimum Superior Version Recommended Superior Version Details
2017-01-07 v3-Premine v0.9.4 v0.10.0 Splits coinbase into denominations
2017-01-07 v4 v0.10.1 v0.10.2.1 Allow normal and RingCT transactions
0000-00-00 v5-skipped v0.10.3.0 v0.10.3.1 Adjusted minimum blocksize and fee algorithm
2017-11-24 v6 v0.11.1 v0.11.1 Allow only RingCT transactions
2018-04-10 v7 v0.12.0 v0.12.1 Change to ASIC Resistant and Block Reward

X's indicate that these details have not been determined as of commit date.

Release staging schedule and protocol

Approximately three months prior to a scheduled mandatory software upgrade, a branch from Master will be created with the new release version tag. Pull requests that address bugs should then be made to both Master and the new release branch. Pull requests that require extensive review and testing (generally, optimizations and new features) should not be made to the release branch.

Installing TheSuperiorCoin from a package

Packages are available for

  • Arch Linux

    • Stable release:
    • Bleeding edge:
  • OS X via Homebrew not ready yet

      brew tap mps01k/cryptonight
      brew install TheSuperiorCoin --build-from-source
    
  • Docker

      # Build using all available cores
      docker build -t superior .
    
      # or build using a specific number of cores (reduce RAM requirement)
      docker build --build-arg NPROC=1 -t superior .
    
      # either run in foreground
      docker run -it -v /superior/chain:/root/.bitsuperior -v /superior/wallet:/wallet -p 17369:17369 superior
    
      # or in background
      docker run -it -d -v /superior/chain:/root/.bitsuperior -v /superior/wallet:/wallet -p 17369:17369 superior
    

Packaging for your favorite distribution would be a welcome contribution!

Compiling Superior Coin 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 3.2.0 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
libunbound 1.4.16 YES libunbound-dev unbound unbound-devel NO DNS resolver
libsodium ? NO libsodium-dev ? libsodium-devel NO libsodium
libminiupnpc 2.0 YES libminiupnpc-dev miniupnpc miniupnpc-devel YES NAT punching
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^ gtest gtest-devel YES Test suite
Doxygen any NO doxygen doxygen doxygen YES Documentation
Graphviz any NO graphviz graphviz graphviz YES Documentation

this is a new dependency you will need on linux sudo apt-get install libzmq3-dev

[^] On Debian/Ubuntu libgtest-dev only includes sources and headers. You may need to 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/

Cloning the Repository

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

git clone --recursive https://github.com/TheSuperiorCoin/TheSuperiorCoin

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

cd TheSuperiorCoin 
git submodule init && git submodule update

Build instructions

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

On Linux and OS X

  • Install the dependencies

  • Change to the root of the source code directory and build:

      cd TheSuperiorCoin
      
      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 OS X, installing zmq.hpp from https://github.com/zeromq/cppzmq to /usr/local/include should fix that error.

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

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

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

      HAVE_DOT=YES doxygen Doxyfile
    

On the Raspberry Pi

Tested on a Raspberry Pi Zero with a clean install of minimal Raspbian Stretch (2017-09-07 or later) from https://www.raspberrypi.org/downloads/raspbian/. If you are using Raspian Jessie, please see note in the following section.

  • apt-get update && apt-get upgrade to install all of the latest software

  • Install the dependencies for SuperiorCoin from the 'Debian' column in the table above.

  • Increase the system swap size:

	sudo /etc/init.d/dphys-swapfile stop  
	sudo nano /etc/dphys-swapfile  
	CONF_SWAPSIZE=1024  
	sudo /etc/init.d/dphys-swapfile start  
  • Clone TheSuperiorCoin and checkout most recent release version:
        git clone https://github.com/TheSuperiorCoin/TheSuperiorCoin.git
	cd TheSuperiorCoin
	git checkout tags/v0.12.1
  • Build:
        make release
  • Wait 4-6 hours

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

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

  • Run Superior with superiord --detach

  • You may wish to reduce the size of the swap file after the build has finished, and delete the boost directory from your home directory

Note for Raspbian Jessie users:

If you are using the older Raspbian Jessie image, compiling Superior is a bit more complicated. The version of Boost available in the Debian Jessie repositories is too old to use with Superior, and thus you must compile a newer version yourself. The following explains the extra steps, and has been tested on a Raspberry Pi 2 with a clean install of minimal Raspbian Jessie.

  • As before, apt-get update && apt-get upgrade to install all of the latest software, and increase the system swap size
	sudo /etc/init.d/dphys-swapfile stop  
	sudo nano /etc/dphys-swapfile  
	CONF_SWAPSIZE=1024  
	sudo /etc/init.d/dphys-swapfile start  
  • Then, install the dependencies for TheSuperiorCoin except libunwind and libboost-all-dev

  • Install the latest version of boost (this may first require invoking apt-get remove --purge libboost* to remove a previous version if you're not using a clean install):

	cd  
	wget https://sourceforge.net/projects/boost/files/boost/1.64.0/boost_1_64_0.tar.bz2  
	tar xvfo boost_1_64_0.tar.bz2  
	cd boost_1_64_0  
	./bootstrap.sh  
	sudo ./b2  
  • Wait ~8 hours
	sudo ./bjam install
  • Wait ~4 hours

  • Change to the root of the source code directory and build:

      cd TheSuperiorCoin
      make release
    
  • Wait ~4 hours

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

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

  • Run Superior with superiord --detach

  • You may wish to reduce the size of the swap file after the build has finished, and delete the boost directory from your home directory

On Windows:

Binaries for Windows are built on Windows using the MinGW toolchain within MSYS2 environment. The MSYS2 environment emulates a POSIX system. The toolchain runs within the environment and cross-compiles binaries that can run outside of the environment as a regular Windows application.

Preparing the Build Environment

  • Download and install the MSYS2 installer, either the 64-bit or the 32-bit package, depending on your system.

  • Open the MSYS shell via the MSYS2 Shell shortcut

  • Update packages using pacman:

      pacman -Syuu  
    
  • Exit the MSYS shell using Alt+F4

  • Edit the properties for the MSYS2 Shell shortcut changing "msys2_shell.bat" to "msys2_shell.cmd -mingw64" for 64-bit builds or "msys2_shell.cmd -mingw32" for 32-bit builds

  • Restart MSYS shell via modified shortcut and update packages again using pacman:

      pacman -Syuu  
    
  • Install dependencies:

    To build for 64-bit Windows:

      pacman -S mingw-w64-x86_64-toolchain make mingw-w64-x86_64-cmake mingw-w64-x86_64-boost mingw-w64-x86_64-openssl mingw-w64-x86_64-zeromq mingw-w64-x86_64-libsodium
    

    To build for 32-bit Windows:

      pacman -S mingw-w64-i686-toolchain make mingw-w64-i686-cmake mingw-w64-i686-boost mingw-w64-i686-openssl mingw-w64-i686-zeromq mingw-w64-i686-libsodium
    
  • Open the MingW shell via MinGW-w64-Win64 Shell shortcut on 64-bit Windows or MinGW-w64-Win64 Shell shortcut on 32-bit Windows. Note that if you are running 64-bit Windows, you will have both 64-bit and 32-bit MinGW shells.

Building

  • If you are on a 64-bit system, run:

      make release-static-win64
    
  • If you are on a 32-bit system, run:

      make release-static-win32
    
  • The resulting executables can be found in build/release/bin

On FreeBSD:

The project can be built from scratch by following instructions for Linux above. If you are running superior in a jail you need to add the flag: allow.sysvipc=1 to your jail configuration, otherwise lmdb will throw the error message: Failed to open lmdb environment: Function not implemented.

We expect to add Superior into the ports tree in the near future, which will aid in managing installations using ports or packages.

On OpenBSD:

OpenBSD < 6.2

This has been tested on OpenBSD 5.8.

You will need to add a few packages to your system. pkg_add db cmake gcc gcc-libs g++ miniupnpc gtest.

The doxygen and graphviz packages are optional and require the xbase set.

The Boost package has a bug that will prevent librpc.a from building correctly. In order to fix this, you will have to Build boost yourself from scratch. Follow the directions here (under "Building Boost"): https://github.com/bitcoin/bitcoin/blob/master/doc/build-openbsd.md

You will have to add the serialization, date_time, and regex modules to Boost when building as they are needed by Superior.

To build: env CC=egcc CXX=eg++ CPP=ecpp DEVELOPER_LOCAL_TOOLS=1 BOOST_ROOT=/path/to/the/boost/you/built make release-static-64

OpenBSD >= 6.2

You will need to add a few packages to your system. pkg_add cmake miniupnpc zeromq libiconv.

The doxygen and graphviz packages are optional and require the xbase set.

Build the Boost library using clang. This guide is derived from: https://github.com/bitcoin/bitcoin/blob/master/doc/build-openbsd.md

We assume you are compiling with a non-root user and you have doas enabled.

Note: do not use the boost package provided by OpenBSD, as we are installing boost to /usr/local.

# Create boost building directory
mkdir ~/boost
cd ~/boost

# Fetch boost source
ftp -o boost_1_64_0.tar.bz2 https://netcologne.dl.sourceforge.net/project/boost/boost/1.64.0/boost_1_64_0.tar.bz2 

# MUST output: (SHA256) boost_1_64_0.tar.bz2: OK
echo "7bcc5caace97baa948931d712ea5f37038dbb1c5d89b43ad4def4ed7cb683332 boost_1_64_0.tar.bz2" | sha256 -c
tar xfj boost_1_64_0.tar.bz2

# Fetch and apply boost patches, required for OpenBSD
ftp -o boost_test_impl_execution_monitor_ipp.patch https://raw.githubusercontent.com/openbsd/ports/bee9e6df517077a7269ff0dfd57995f5c6a10379/devel/boost/patches/patch-boost_test_impl_execution_monitor_ipp
ftp -o boost_config_platform_bsd_hpp.patch https://raw.githubusercontent.com/openbsd/ports/90658284fb786f5a60dd9d6e8d14500c167bdaa0/devel/boost/patches/patch-boost_config_platform_bsd_hpp

# MUST output: (SHA256) boost_config_platform_bsd_hpp.patch: OK
echo "1f5e59d1154f16ee1e0cc169395f30d5e7d22a5bd9f86358f738b0ccaea5e51d boost_config_platform_bsd_hpp.patch" | sha256 -c
# MUST output: (SHA256) boost_test_impl_execution_monitor_ipp.patch: OK
echo "30cec182a1437d40c3e0bd9a866ab5ddc1400a56185b7e671bb3782634ed0206 boost_test_impl_execution_monitor_ipp.patch" | sha256 -c

cd boost_1_64_0
patch -p0 < ../boost_test_impl_execution_monitor_ipp.patch
patch -p0 < ../boost_config_platform_bsd_hpp.patch

# Start building boost
echo 'using clang : : c++ : <cxxflags>"-fvisibility=hidden -fPIC" <linkflags>"" <archiver>"ar" <striper>"strip"  <ranlib>"ranlib" <rc>"" : ;' > user-config.jam
./bootstrap.sh --without-icu --with-libraries=chrono,filesystem,program_options,system,thread,test,date_time,regex,serialization,locale --with-toolset=clang
./b2 toolset=clang cxxflags="-stdlib=libc++" linkflags="-stdlib=libc++" -sICONV_PATH=/usr/local
doas ./b2 -d0 runtime-link=shared threadapi=pthread threading=multi link=static variant=release --layout=tagged --build-type=complete --user-config=user-config.jam -sNO_BZIP2=1 -sICONV_PATH=/usr/local --prefix=/usr/local install

Build cppzmq

Build the cppzmq bindings.

We assume you are compiling with a non-root user and you have doas enabled.

# Create cppzmq building directory
mkdir ~/cppzmq
cd ~/cppzmq

# Fetch cppzmq source
ftp -o cppzmq-4.2.3.tar.gz https://github.com/zeromq/cppzmq/archive/v4.2.3.tar.gz

# MUST output: (SHA256) cppzmq-4.2.3.tar.gz: OK
echo "3e6b57bf49115f4ae893b1ff7848ead7267013087dc7be1ab27636a97144d373 cppzmq-4.2.3.tar.gz" | sha256 -c
tar xfz cppzmq-4.2.3.tar.gz

# Start building cppzmq
cd cppzmq-4.2.3
mkdir build
cd build
cmake ..
doas make install

Build TheSuperiorCoin: env DEVELOPER_LOCAL_TOOLS=1 BOOST_ROOT=/usr/local make release-static

On Solaris:

The default Solaris linker can't be used, you have to install GNU ld, then run cmake manually with the path to your copy of GNU ld:

    mkdir -p build/release
    cd build/release
    cmake -DCMAKE_LINKER=/path/to/ld -D CMAKE_BUILD_TYPE=Release ../..
    cd ../..

Then you can run make as usual.

On Linux for Android (using docker):

    # Build image (select android64.Dockerfile for aarch64)
    cd utils/build_scripts/ && docker build -f android32.Dockerfile -t superior-android .
    # Create container
    docker create -it --name superior-android superior-android bash
    # Get binaries
    docker cp superior-android:/opt/android/TheSuperiorCoin/build/release/bin .

Building Portable Statically Linked Binaries

By default, in either dynamically or statically linked builds, binaries target the specific host processor on which the build happens and are not portable to other processors. Portable binaries can be built using the following targets:

  • make release-static-linux-x86_64 builds binaries on Linux on x86_64 portable across POSIX systems on x86_64 processors
  • make release-static-linux-i686 builds binaries on Linux on x86_64 or i686 portable across POSIX systems on i686 processors
  • make release-static-linux-armv8 builds binaries on Linux portable across POSIX systems on armv8 processors
  • make release-static-linux-armv7 builds binaries on Linux portable across POSIX systems on armv7 processors
  • make release-static-linux-armv6 builds binaries on Linux portable across POSIX systems on armv6 processors
  • make release-static-win64 builds binaries on 64-bit Windows portable across 64-bit Windows systems
  • make release-static-win32 builds binaries on 64-bit or 32-bit Windows portable across 32-bit Windows systems

Running superiord

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/superiord

To list all available options, run ./bin/superiord --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.

To run in background:

./bin/superiord --log-file superiord.log --detach

To run as a systemd service, copy superiord.service to /etc/systemd/system/ and superiord.conf to /etc/. The example service assumes that the user superior exists and its home is the data directory specified in the example config.

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

Internationalization

See README.i18n.md.

Using Tor

While TheSuperiorCoin isn't made to integrate with Tor, it can be used wrapped with torsocks, by setting the following configuration parameters and environment variables:

  • --p2p-bind-ip 127.0.0.1 on the command line or p2p-bind-ip=127.0.0.1 in superiord.conf to disable listening for connections on external interfaces.
  • --no-igd on the command line or no-igd=1 in superiord.conf to disable IGD (UPnP port forwarding negotiation), which is pointless with Tor.
  • DNS_PUBLIC=tcp or DNS_PUBLIC=tcp://x.x.x.x where x.x.x.x is the IP of the desired DNS server, for DNS requests to go over TCP, so that they are routed through Tor. When IP is not specified, superiord uses the default list of servers defined in src/common/dns_utils.cpp.
  • TORSOCKS_ALLOW_INBOUND=1 to tell torsocks to allow superiord to bind to interfaces to accept connections from the wallet. On some Linux systems, torsocks allows binding to localhost by default, so setting this variable is only necessary to allow binding to local LAN/VPN interfaces to allow wallets to connect from remote hosts. On other systems, it may be needed for local wallets as well.
  • Do NOT pass --detach when running through torsocks with systemd, (see utils/systemd/superiord.service for details).

Example command line to start superiord through Tor:

DNS_PUBLIC=tcp torsocks superiord --p2p-bind-ip 127.0.0.1 --no-igd

Using Tor on Tails

TAILS ships with a very restrictive set of firewall rules. Therefore, you need to add a rule to allow this connection too, in addition to telling torsocks to allow inbound connections. Full example:

sudo iptables -I OUTPUT 2 -p tcp -d 127.0.0.1 -m tcp --dport 16035 -j ACCEPT
DNS_PUBLIC=tcp torsocks ./superiord --p2p-bind-ip 127.0.0.1 --no-igd --rpc-bind-ip 127.0.0.1 \
    --data-dir /home/amnesia/Persistent/your/directory/to/the/blockchain

Debugging

This section contains general instructions for debugging failed installs or problems encountered with Superior. First ensure you are running the latest version built from the Github 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/superiord `pidof superiord` 

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 superiord. 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/superiord /path/to/dumpfile

Print the stack trace with bt

  • To run superior within gdb:

Type gdb /path/to/superiord

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

Type run to run superiord

Analysing memory corruption

We use the tool valgrind for this.

Run with valgrind /path/to/superiord. It will be 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 ~/superior/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.